WRX STI

Press Kits

GENERAL TECHNICAL INFORMATION

2011 New Subaru WRX STI

OVERVIEW

  • Latest model is quickest-ever incarnation of the standard WRX STI across country
  • Major chassis upgrades, based around new ‘spec. C’ suspension
  • New four-door saloon model joins five-door hatchback
  • 0-62mph in 5.2 seconds, top speed of 158mph (four-door)
  • Improved-quality materials for interior
  • Evocative boxer-engine ‘burble’ is enhanced

Ever since its introduction in 2001, the Subaru Impreza WRX STI has been a byword for exceptional real-world driving performance.  The latest model incorporates a wide range of developments which maintain the continual evolution of this iconic vehicle.

So synonymous are those six letters (WRX STI) with automotive exhilaration, that for this latest generation, the ‘Impreza’ moniker has been dropped and the new car will henceforth be known simply as the ‘Subaru WRX STI’.

In response to significant market demand the four-door saloon version of the Subaru WRX STI is once again available, after an absence of three years.  The hatchback variant will remain on sale, and this will consequently mark the first time that four- and five-door versions of the car have been sold alongside one another in the UK.

In order to refine its all-round performance, the 2011 WRX STI has been extensively tested under a wide variety of weather, traffic and road conditions, ranging from slow, congested city driving and rapid B-road sprints, to extreme ‘hot laps’ around famous racing circuits – including the notorious Nordschleife at the Nürburgring in Germany. 

The new WRX STI benefits from a stiffened bodyshell and an extensively reworked suspension system – based upon the marque’s widely praised ‘spec. C’ set-up.  Lower ride height and wider tyres also contribute to more direct and accurate control of the car and greater feedback for the driver. 

The more rigid bodyshell has also made it possible to increase suspension travel, benefiting road-holding as well as ride refinement.  An all-new design of wheel saves approximately two kilograms of un-sprung weight per corner compared to the outgoing model, helping to further improve ride and handling, as well as enhancing the car’s appearance.

Exterior styling is extensively revised, with new bumpers, enlarged rear quarter panels and lower ride height giving the car a more muscular presence.  Inside, the quality of the cabin materials has been upgraded, and the driver and passenger are assured of a secure and comfortable seating position thanks to the introduction of all-new RECARO bucket seats.

The widely praised 2.5-litre Subaru boxer 16-valve turbo engine with Dual Active Valve Control produces 300PS at 6,000rpm and massive torque – with a peak of 407Nm at 4,000rpm – even from low-revs.  While these outputs are unchanged from the outgoing STI, improved torque delivery throughout the rev range translates into better response and more linear acceleration.  The zero-to-62mph sprint is achieved in just 5.2 seconds. 

Significantly, the revised engine is cleaner – successfully meeting Euro 5 exhaust emissions standards.

Central to the agile handling of Subaru vehicles is the company’s legendary Symmetrical AWD (All-Wheel drive) system.  This consists of the horizontally-opposed boxer engine, with its intrinsic low centre of gravity, combined with advanced AWD technology incorporating sophisticated front, centre and rear differentials.  For the new WRX STI the system has been uprated, with revised settings for the differentials. 

The car features a default setting of 41 / 59 per cent front / rear torque distribution for optimum balance, and the driver can adjust this while on the move using the four-mode (Driver’s Control Centre Differential) system.  The WRX STI also incorporates Multi-Mode VDC (Vehicle Dynamics Control) – Subaru’s version of electronic stability control (ESC), allowing the driver to modify the point of intervention of this electronic driver aid to suit their own tastes.

In order to develop a vehicle that provides exceptional levels of high performance and precision handling, together with user-friendly daily motoring driveability on demand, Subaru has further tuned its three-mode SI-Drive (Subaru Intelligent Drive) system, which can be used to adjust the engine’s characteristics to best suit a variety of driving conditions.

Aficionados of Subaru performance vehicles will be cheered by the news that a new exhaust system, with a larger centre muffler and larger diameter piping, enhances the engine’s iconic boxer ‘burble’. 

Standard equipment includes keyless entry, push button start, front fog lamps, hill start assist, climate control air-conditioning, remote central locking, electric windows front and rear, and all-new radio-CD unit with a 10-speaker audio system, AUX/iPod and USB input jacks, hands-free Bluetooth® system, satellite tracker and cruise control.

STYLING AND DESIGN

Bolder stance, ‘wide and low’ look, heightened road presence

The new 2011 WRX STI design is based on a ‘wide and low’ concept – giving the car a more aggressive road presence.  It features more pronounced front bumpers and rear quarter panels to wrap around the wider 245/40 R18 tyres.  The exterior design incorporates a consistent flow of muscular lines from front to rear bumper, creating a distinctive identity, and endows both the new WRX STI saloon and hatchback with a more lithe and purposeful appearance.

The new saloon variant has an overall length of 4,580 mm (165 mm longer than the hatchback), while both bodystyles feature a 2,625 mm wheelbase and 1,795 mm overall width.

A completely refreshed front-end is distinguished by angular bumpers and a more prominent lip spoiler with intricate three-dimensional detailing.  The newly designed mesh grille is crowned by a blacked-out Subaru floating wing motif. 

The new saloon is a little sleeker than its hatchback sibling with an aerodynamic Cd of 0.34 – compared with the five-door model’s 0.36.  A new, larger and carefully profiled undertray optimises the aerodynamic performance of both model variants.

Both saloon and hatch feature a new exhaust system with a larger centre muffler and larger diameter 80mm piping tuned to enhance the engine’s iconic boxer ‘burble’.  The four-door WRX STI boasts a bespoke version of the polished stainless steel quad-tailpipes.  New, lighter 18-inch diameter, 8.5-inch wide alloy wheels with a multi-spoke design and high-lustre paint are fitted to both hatch and saloon as standard.

A new exterior body colour has been added to the 2011 WRX STI line-up: Plasma Blue Silica.  Five other hues, including Obsidian Black Pearl, Spark Sliver Metallic, Dark Gray Metallic, Lightning Red and Satin White Pearl, are also available.

INTERIOR

New design and materials improve cabin’s premium feel

For 2011, the WRX STI maintains its forebear’s sporty cockpit but now utilises new, higher-quality materials and fresh colours to create an even more engaging environment.  The new metallic colour schemes for the trim accents come in either a dark ‘cast metal’ or ‘sharply radiant’ silver finish.  These upgrades to the dashboard and door trim reinforce the impression of sportiness and elegance.

The front bucket seats feature a combination of Alcantara and leather and are designed to hold the driver and passenger comfortably and securely in place.  Jointly developed with RECARO, the new seats offer improved bolstering and back support, and their extended range of height adjustment enables users to select an even lower hip point, if desired.

In addition to housing the audio and cruise controls, the rake and reach-adjustable steering wheel now accommodates controls for the Bluetooth® system.  The vehicle information display, which constantly shows outside temperature, mileage and time, as well as the audio display, have been placed nearer the top of the dashboard for improved visibility and accessibility.

In the familiar tri-gauge instrument binnacle, drivers will find a large central tachometer located between the speedometer and fuel readout.  For 2011 the design has been simplified and the dials are now easier to read.  Upon start-up, the needles of the three meters briefly swing up to their maximum positions and quickly fall back, ‘welcoming’ the driver and highlighting the lively potential of the WRX STI.

The instrument cluster also comes with a rev indicator, DCCD Torque indicator and a ‘Shift-up’ indicator.  The centre stack is embellished with the STI logo, which is illuminated while the headlights are on.  The dial-control for the SI-Drive and the DCCD is mounted on top of the centre console, and red LED lights are used for interior door step lights. 

Standard equipment on the 2011 WRX STI includes: climate control air-conditioning, ventilation and heating ducts to the rear seat, remote central locking, electric windows (front and rear), radio-CD unit with a 10-speaker audio system, AUX/iPod and USB input jacks, hands-free Bluetooth® system, cruise control privacy glass, heated door mirrors, keyless entry and engine start button.

Practicality for everyday motoring

The compact design of the double wishbone rear suspension, fitted to both the hatchback and saloon versions of the WRX STI, ensures minimum intrusion into the interior and leaves room for a wider and deeper luggage compartment.

Hatchback models have boot capacity of 301 litres with the rear seats upright, which can be expanded to a highly competitive 1,216 litres with the seats folded.  In the 165mm longer saloon models, luggage capacity is increased by 40 per cent to 420 litres.  Both models are fitted with 60 / 40 split folding rear seats.

Storage space within the cabin includes two front cupholders in the centre console, a pocket for a 500ml bottle in each of the four doors, a centre console box with room for eight CD cases, and a dashboard console tray which provides space for small items such as wallets and mobile phones.

ENGINE AND TRANSMISSION

Fine tuning results in 300PS / 407Nm for even better performance

The horizontally-opposed ‘boxer’ engine is a long-established defining feature of Subaru vehicle technology, and has become inextricably linked to the Subaru brand.  This engine’s innate characteristics – light weight, compact and low configuration, high rigidity, and superb rotational balance – are key to building the unique sporting character of Subaru’s performance vehicles.

The engine development programme for the 2011 WRX STI started from this ideal base.  By fine tuning each individual technical element, Subaru’s engineers have created a special powertrain that delivers generous power output combined with improved environmental performance, complying with Euro 5 exhaust emission standards.

In its latest 2011 form, the 2.5-litre Subaru boxer 16-valve turbo engine with Dual Active Valve Control System produces 300PS at 6,000rpm and massive torque – with a peak of 407Nm at 4,000rpm – even from low-revs.  The engine spins rapidly and smoothly up to the red zone at 6,700rpm.  The improved torque throughout the rev range translates into better response and more linear acceleration, with the zero-to-62mph sprint achieved in just 5.2 seconds.

While achieving this performance, the revised engine successfully meets Euro 5 exhaust emissions standards. 

Features which enable the 2011 Subaru boxer engine to deliver this unusual blend of high performance with class-competitive fuel consumption and emissions include:

1.         Electronic Throttle Control (ETC)

An adaptable electronic, rather than physical, linkage between the accelerator and the engine’s throttle ensures accurate control of such a powerful engine, while also reducing fuel consumption.

2)         Dual Active Valve Control System (Dual AVCS)

Variable valve timing controls on both the intake and exhaust valves work precisely to optimise the cylinder charging and combustion efficiency throughout the rev range.  Benefits are better low-to-mid rev range torque, high-rev range power output and overall environmental performance.

3.         Intercooler

The capacity of the intercooler has been enlarged, thus improving the charging efficiency of intake air by reducing its temperature before it enters the engine.

4.         Centre muffler

The capacity of the new centre muffler in the exhaust system has been increased by changing its mounting from a longitudinal into a lateral location, making better use of the available space beneath the car. 

Environmental performance has been enhanced by the adoption of two new systems:

1.         Tumble Generation Valve (TGV)

This mechanism generates strong air stream ‘tumble’ inside the engine’s intake air system so that the air fuel mixture under cold conditions can be improved.  This results in cleaner exhaust emissions during cold start conditions.

2.         Secondary Air System

This system injects quantities of fresh air into the exhaust port while the engine is ‘cold’ so that non-burnt gases can be re-burnt.  It minimises hydro-carbon emissions and also helps to activate the catalyst quickly.

Multi-mode engine management

In order to develop a vehicle that provides exceptional levels of high performance and precision handling, together with user-friendly daily motoring driveability on demand, Subaru has fine-tuned its SI-Drive (Subaru Intelligent Drive) system to adjust the engine’s characteristics to best suit a variety of driving conditions.

SI-Drive enables the driver to choose three different engine mappings according to the driving environment or the driver’s mood.  From the most responsive and exhilarating performance mode, to smooth operating city drive mode (where owners can also benefit from lower fuel consumption), drivers can now enjoy the potential of the WRX STI engine in every situation.

Mode 1 – Intelligent

In this mode, the engine’s torque production character is more measured for a given accelerator depression so that smoother control of the vehicle is achieved.  A ‘shift-up’ indicator is activated (within the instrument cluster), to recommend the best gear change point for the enhanced fuel economy.  This mode is suitable whenever a delicate throttle control is needed, such as when driving on a congested road.  If the driver suddenly needs more performance, depressing the accelerator further will disengage ‘Intelligent mode’ and make maximum engine torque available.

Mode 2 – Sport

This mode sets the engine’s torque character to its most linear form, output relating directly to the position of the accelerator pedal.  This is an all-encompassing setting so that it can cover any driving conditions.

Mode 3 – Sport Sharp

The maximum potential of the WRX STI engine is fully released in this mode.  The torque production compared to the accelerator operation is set for the sharpest response, so that the driver can exploit the car’s quickest reactions to demanding driving situations.

Six-speed manual transmission

Based on Subaru’s in-house developed six-speed manual transmission, which has already gained a reputation for its precision and durability, the transmission for the 2011 WRX STI has been upgraded to ensure that using the manual shift plays a key role in maximising driving pleasure.

Transmission improvements included a triple-cone synchroniser on 1st gear, a reduction of 30 per cent in the force required to shift gear, and lowered internal friction within the gearbox by modifying the shift sleeves at 1-2, 3-4 and 5-6 shifting mechanism.

AWD DRIVETRAIN

Sophisticated AWD technology with multi-mode stability control

The key hardware at the very core of so many Subaru vehicles is the company’s legendary Symmetrical AWD (All-Wheel drive) system.  This consists of the horizontally-opposed boxer engine with its low centre of gravity combined with advanced AWD technology incorporating sophisticated front, centre and rear differentials.  For the 2011 WRX STI the system has been comprehensively updated, with differentials now incorporating revised settings. 

The mechanical centre differential system employs Subaru’s DCCD (Driver’s Control Centre Differential) system which controls the torque distribution ratio between the front and rear axles and features a default setting of 41 / 59 per cent front / rear for the optimum balance between agility and handling stability.

Drivers are offered a choice of four DCCD modes – three automatic and a manual mode – to best suit his or her preference or the road conditions and driving situations:

1.         AUTO Mode

This default mode can cover any road conditions and driving situations.

2.         AUTO+ Mode

Centre differential is kept tightened during the course of driving so that overall traction is maximised.  This mode is ideal for use in slippery conditions.

3.         AUTO- Mode

Centre differential is kept loosened during the course of driving so that sharp handling performance is maintained.  It is best used on the dry road conditions offering high levels of grip.

4.         Manual Mode

Differential can be set to ‘manual’ over a range of six steps. 

The front LSD is ‘Helical’ and its torque binding effect is minimal so that the driver can easily anticipate the reaction of the vehicle under threshold situations.

At the rear, the LSD is a ‘Torsen’ unit, which responds very quickly and has a torque binding effect which is obtained smoothly to give drivers maximum ease of control.

The ‘Multi-Mode VDC’ (Vehicle Dynamics Control) system fitted to the WRX STI is Subaru’s comprehensive electronic stability control (ESC) system, with variable settings that can change the point of ‘intervention’ to ensure maximum driving pleasure.

The VDC system reduces engine power and / or applies one or more brakes to correct excessive understeer or oversteer to keep the car on the course intended by the driver.  To provide more handling options to WRX STI drivers, the 2011 model offers three modes:

1.         NORMAL Mode

This default mode is fully automatic and suitable for all road conditions and driving situations.  VDC uses the ABS (Anti-lock Brake System), TCS (Traction Control System) and Stability Assist to deliver maximum stability.

2.         TRACTION Mode

Activation of the TCSS is limited to allow drivers to exploit their car’s performance without electronic intervention until greater slip and yaw angles have been reached.

3.         OFF Mode

TCS and Stability Assist can be deactivated, while the ABS remains fully functional.  This mode is useful when tackling extremely slippery conditions like deep snow or mud, when some wheelspin is an aid to progress when setting off from standstill. 

CHASSIS AND RUNNING GEAR

New ‘spec. C’ suspension creates the ‘best-ever’ handling for Subaru

Engineers on the WRX STI chassis development programme worked towards the Subaru Dynamic Chassis Control Concept (DC3).  The concept aimed to exploit the benefits of the 2011 model’s more rigid bodyshell to adopt more compliant suspension settings and ensure that all four tyres contribute to accelerating, turning and braking the car to optimum effect for a truly dynamic driving experience. 

The most significant of the changes is the introduction of Subaru’s widely praised ‘spec. C’ suspension, which has improved handling response, manoeuvring precision and road-holding ability.  The changes to the spring rates and stabilisers, combined with a lowering of the ride height by 5mm, have greatly improved roll stiffness.  These modifications, together with the fitting of wider, lower-profile 245 / 40 R18 tyres as standard, have helped secure an increase in maximum lateral-G.  The new model’s 1,505kg kerb weight is distributed 58 / 42 per cent front / rear.

The MacPherson strut front suspension has been uprated with the adoption of pillow-ball-type rear-end bushes in the lower arms – a first for production Subaru models.  This introduction greatly enhances longitudinal and lateral stiffness, making the steering feel even more assured and responsive. 

The road-holding ability of the front tyres has been greatly improved by optimising the suspension geometry, including toe and camber angles, as well as by increasing the suspension travel.  The front spring rates have been raised 15.6 per cent and the stabiliser bar diameter increased by 5 per cent to 21mm.

At the rear, the suspension’s sub-frame bushes were changed to improve camber stiffness, resulting in heightened responsiveness and increased road-holding capability.  Double wishbones are employed and superior road-holding has been achieved by optimising the geometry and by increasing travel.  Spring rates are up by 53 per cent and the stabiliser bar is thicker – 19mm compared to 18mm on previous models.

The 2011 WRX STI’s steering is a quick-ratio rack and pinion system with hydraulic speed-sensitive variable power assistance, requiring 2.8 turns of the steering wheel lock-to-lock, with an 11.0 metre turning circle.

Brembo all-ventilated disc braking system

To meet drivers’ demanding expectations for such a high performance model, an immensely powerful, all-ventilated disc braking system for the WRX STI has been jointly developed by Subaru and the famous Italian motorsport and supercar brake specialists, Brembo.  The response and controllability of the new brake system have been improved, with super-low expansion brake hoses, a tie-rod type brake booster, optimised master cylinder design and an enhanced brake pedal mechanism. 

The ventilated front discs measure 326 x 30mm and feature four-pot calipers.  The rear discs, also ventilated, are 316 x 20mm units, equipped with twin-pot calipers.

The braking system is supported by electronic aids to ensure maximum retardation, including: Super Sports ABS – a high performance anti-lock system with an additional lateral G-sensor to monitor yaw-rates; EBD (Electronic Brake Force Distribution) which compensates for differing weight distribution depending on the number of passengers, luggage, etc; and Brake Assist which detects an emergency situation and delivers maximum stopping power.

The 2011 WRX STI is fitted with new, lightweight 18 x 8.5J cast aluminium wheels, finished in high-lustre silver paint.  The weight saving is approximately two kilograms per wheel, compared to previous Subaru wheels, reducing un-sprung weight which benefits ride and handling.  Dunlop SP600 (245 / 40 R18) tyres were chosen for their high levels of grip and well-balanced performance in both dry and wet conditions.

STRUCTURE AND SAFETY

Circular links enhance bodyshell strength and occupant protection

The new 2011 WRX STI uses an advanced form of Subaru’s ‘Ring-Shaped Reinforcement Frame Body Structure’ (RSR) which results in a stronger and stiffer bodyshell compared with earlier Impreza models, and delivers benefits in terms of handling, ride, refinement and impact resistance.

Following the RSR engineering philosophy, the A-, B- and C-pillars are reinforced and the pillars on each side of the car are joined by cross members at both the roof and floor levels to create a series of ‘circular links’ (or rings) which ensure high levels of occupant protection.  A higher percentage of ultra-high-strength steel is used at key locations in the new bodyshell to achieve strength without adding significantly to overall weight.

Thanks to this advanced construction technique, the WRX STI achieves high levels of safety and crash worthiness by absorbing and dispersing impact energy in frontal, side, and rear crashes.  As well as looking after the car’s occupants, the car’s bonnet is specifically designed to disperse the energy of a pedestrian impact and to minimise injuries.

For optimum visibility when driving at night, the 2011 WRX STI comes equipped with Xenon high-intensity discharge headlamps and pop-up headlamp washers as standard.

All models are equipped with dual front, side and curtain airbags, as well as three-point seat belts in the front and rear.  A collapsible brake pedal reduces the risk of driver foot injury in frontal accidents.  In the rear, the seat accommodates two ISOFIX-compatible child safety seat mountings.

While the highly specified Brembo braking system takes care of stopping, electronic assistance is also available when setting off.  In addition to traction control, the 2011 WRX STI is equipped with a ‘Hill Start Assist’ system that maintains brake pressure for approximately one to two seconds after the brake pedal is released to prevent roll-back and assist the driver in making a smooth take-off on gradients.

EQUIPMENT

The table below details the full list of standard equipment (and options) fitted to both the four-door saloon and five-door hatchback 2011 Subaru WRX STI.

Item

WRX STI

Four-door

Five-door

Exterior

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HID low beam headlamps

  •  

  •  


Pop-up type headlamp washers

  •  
  •  


Front fog lamps

  •  
  •  


Rear fog lamp

  •  
  •  


Power-folding door mirrors with built-in LED turn signal

  •  
  •  


Designed blade, variable intermittent windshield wipers

  •  
  •  


Intermittent rear window wiper

        _

  •  


18-inch  aluminium alloy wheels (High-lustre)

  •  
  •  


Carrier installation brackets

  •  
  •  


Floor under cover

  •  
  •  


Side under spoilers

  •  
  •  


Rear diffuser

        _

  •  


Large roof spoiler (five-door)

        _

  •  


Roof antenna

  •  
  •  


Privacy glass for rear doors, rear quarters and rear window

  •  
  •  


Twin dual tail muffler

  •  
  •  

 

Seating / trims

 

 


Leather wrapped steering wheel with red stitching

  •  
  •  


Leather wrapped gearshift knob and hand brake lever

  •  
  •  


Sporty front seats with red stitching (Alcantara*)

  •  
  •  


RECARO front seats with red stitching (Alcantara*)

  •  
  •  


Manual seat lifter (driver’s seat only)

  •  
  •  


60 / 40 split folding rear seats (four-door: Trunk through)

  •  
  •  


Plated inner door handles

  •  
  •  


Metal door step panels (front, both sides)

  •  
  •  

 

Comfort / convenience

ã??

ã??


Power windows*2

  •  
  •  


Remote control key system

  •  
  •  


Keyless Access and Push Button Start System

  •  
  •  


Map lamps

  •  
  •  


Trunk room lamp(4-Door) / Luggage space lamp(5-Door)

  •  
  •  


Vanity mirrors with lids (for driver and front passenger)

  •  
  •  


Centre tray with lamp

  •  
  •  


Centre console box

  •  
  •  

 


Front cup holders (in the centre console)

  •  
  •  


Door pockets with bottle holders (on all side doors)

  •  
  •  


Interior fuel lid lock release

  •  
  •  


Two 12-volt power outlets (in the instrument panel and centre console box)

  •  
  •  


Retractable cargo cover

        _

  •  

 

Temperature control

ã??

ã??


Automatic air-conditioning system with anti-dust filter

  •  
  •  


Heater ducts for rear passengers

  •  
  •  


Windshield wiper de-icer

  •  
  •  


Heated door mirrors

  •  
  •  


Front and side defrosters

  •  
  •  


Electric rear window defogger with timer

  •  
  •  

 

Entertainment and navigation

ã??

ã??


2-DIN audio: 1-CD with 10 speakers

  •  
  •  


Steering wheel mounted audio remote control switches

  •  
  •  


Auxiliary audio and USB/iPod input jack (in the centre console box)

  •  
  •  


Bluetooth®*3 compatible hands-free system

  •  
  •  

 

Control / Instruments

ã??

ã??


Electro-luminescent gauges

  •  
  •  


Driver-set rev indicator

  •  
  •  


Information display*4

  •  
  •  


Quick ratio power steering

  •  
  •  


Tilt-adjustable/telescopic steering wheel

  •  
  •  


Cruise control

  •  
  •  


Aluminium pedals

  •  
  •  

 

Drivability

ã??

ã??


SI-DRIVE (SUBARU Intelligent Drive)

  •  
  •  


Multi-mode Vehicle Dynamics Control System

  •  
  •  


Multi-mode DCCD (Driver’s Control Centre Differential)

  •  
  •  


Hill Start Assist

  •  
  •  


Brembo brakes (front and rear)

  •  
  •  

 

Safety

ã??

ã??


Front SRS*5 airbags

  •  
  •  


Front side SRS*5 airbags (for driver and front passenger)

  •  
  •  


Curtain SRS*5 airbags (front and rear, both sides)

  •  
  •  


Side-door reinforcement beams (front and rear, both sides)

  •  
  •  


Steering column support beam

  •  
  •  


Rear seat headrests for three seating positions

  •  
  •  


Seatbelt indicator (for driver)

  •  
  •  


Front seatbelts with pretensioners and load limiters

  •  
  •  


Height adjustable seatbelt anchors (for driver and front passenger)

  •  
  •  

 


Rear three-point seatbelts for 3 seating positions

  •  
  •  


Safety brake pedal system

  •  
  •  


Four-sensor / four-channel Super Sports ABS with Electronic Brake-force Distribution

  •  
  •  


Brake assist system

  •  
  •  


ISO-FIX adapted child seat anchors (with tether anchors)

  •  
  •  


Child-proof rear door locking (both sides)

  •  
  •  


Anti-theft security system with engine immobiliser

  •  
  •  


Satellite security tracker system

  •  
  •  


Security window etching

  •  
  •  

 

* Alcantara® is a registered trademark of Alcantara S.p.A.
*1 Synthetic leather (PVC) is used for some parts of seats' upholstery
*2 Driver's side front window has auto up/down function with pinch protection
*3 Bluetooth® is a registered trademark of Bluetooth SIG, Inc. America
*4 It shows: current fuel consumption, average fuel consumption, ambient temperature and clock
*5 SRS: Supplemental Restraint System. Must be used in conjunction with seatbelts

 

02/01/13

 

Technical Specifications 2011 WRX STI

2011 WRX STI

Body and chassis
Four-door saloon or five-door hatchback, bodystyles, with all-steel unitary construction bodyshell.  Longitudinally-mounted petrol engine driving the front and rear wheels – Subaru All-Wheel Drive (AWD) – via a six-speed manual transmission. 

Engine
2.5-litre 300 ps ‘Boxer’

Type                                        DOHC, horizontally-opposed, four-cylinder with 16 valves, Dual AVCS and high-boost turbocharger
Capacity                                  2.5-litre, 2457cc
Max power                              300ps (296.4 bhp) @ 6,000rpm
Max torque                              407Nm (300.2 lbs. ft) @ 4,000rpm
Bore x stroke                          99.5 x 79mm
Compression ratio                  8.2:1
Fuel system                           Multi-point fuel injection
Construction                          Aluminium cylinder-block and head
Emissions class                    Euro 5

Transmission
Type                                       Six-speed manual
Gear ratios
1st                                         3.636:1
2nd                                        2.235:1
3rd                                        1.590:1
4th                                         1.137:1
5th                                         0.891:1
6th                                         0.707:1
Reverse                                3.545:1
Final Drive                            3.900:1 (Front)

                                              3.545:1 (Rear)

Drivetrain

All-Wheel Drive (AWD)        Delivers 41 / 59 per cent of torque to the front / rear wheels as default setting. 
                                             Safety aided by electronic TCS (traction control system),
                                             ABS (anti-lock braking system) and VDC (Vehicle Dynamics Control) system
                                             with Hill-start Assist Control.  
                                             Four-mode centre differential.  
                                             Helical front differential.  Torsen rear differential.

 

Suspension and damping
Front                                     Fully independent by MacPherson Struts, with coil springs and gas-filled shock absorbers.  
                                              21mm diameter anti-roll stabiliser bar.

Rear                                     Fully independent by double wishbones, with coil springs and gas-filled shock absorbers.
                                             19mm diameter anti-roll stabiliser bar.

Steering
Type                                      Hydraulic power-assisted rack and pinion
Gearing                                2.8 turns lock-to-lock
Turning circle                     11.0 metres

Brakes
Front                                     326 x 30mm ventilated discs with four-pot calipers
Rear                                     316 x 20mm ventilated discs with two-pot calipers
Parking brake                     Hand-operated lever

ABS                                       Four-channel anti-lock system with EBD

BAS (Brake Assist System)   Boosts braking power during emergency stops

Wheels and tyres
Standard                                Alloy 18-inch x 8.5J with 245 / 40 R18 tyres

Spare (Standard)                 Space saver, T135 / 70 D17

Exterior dimensions (mm)
Overall length                        4,580 (saloon)             4,415 (hatchback)

Overall width*                        1,795                                      
Overall height                        1,470
Wheelbase                             2,625
Front track                              1,530
Rear track                               1,540
Ground clearance                 150

*excluding door mirrors

Capacities
Fuel tank                                 60 litres 

Luggage (VDA)                      420 litres (saloon)        301 litres (hatchback, rear seats up) 
                                                                                           1,216 litres (rear seats folded)

Weights
Kerb weight                            1,505 kg (saloon and hatchback)
Weight distribution                58 / 42 per cent front / rear

Performance
Top speed / mph                  158 (saloon)                155 (hatchback) 
0-to-62 mph                           5.2 sec

Fuel economy
Combined cycle                    26.9 mpg
CO2                                         243 g/km

Aerodynamics
Cd                                           0.34 (saloon)               0.36 (hatchback)

 

HISTORY

WRX STI timeline

1992                Subaru Impreza launched in Japan.  Introduced to replace the Legacy after a                  
                          rule change in the World Rally Championship (WRC).

1994                Subaru Impreza Turbo officially launched in the UK. 

1995                Subaru won the World Rally Championship in a 555-branded WRC Impreza driven by the
                          late Colin McRae. It marked the first time a British driver had won the WRC.

1995                To celebrate Subaru’s success in WRC the McRae Series Impreza was released. 
                         Additions included sports seats, eye-catching alloy wheels and a special new colour.  

1997                Subaru won a hat-trick of manufacturer championships and celebrated this by releasing a new
                         special edition – Subaru Impreza Terzo.

1997                A special two-door coupe was released in the Japan Domestic Market. 
                         This was later used as the platform for the 1998 WRC car.

1998                The 345bhp 22B STI was introduced to commemorate the Subaru’s 40th anniversary.

2001                Subaru unveils the STI Type UK, which was offered with an optional Prodrive Performance
                          Package (PPP).

2002                The Impreza STI range received a range of cosmetic upgrades, with power levels unchanged.  

2004                The revisions in 2004 saw the standard STI Type-UK receive mechanical revisions,
                         as per its Japanese counterpart. 

2007                Debuted at the Tokyo Auto Show in October 2007, the “wide-body” hatchback Impreza STI left the
                         factory with 300bhp. 

 

-ENDS-

02/01/13

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OVERVIEW

  • Latest model is quickest-ever incarnation of the standard WRX STI across country
  • Major chassis upgrades, based around new ‘spec. C’ suspension
  • New four-door saloon model joins five-door hatchback
  • 0-62mph in 5.2 seconds, top speed of 158mph (four-door)
  • Improved-quality materials for interior
  • Evocative boxer-engine ‘burble’ is enhanced

Ever since its introduction in 2001, the Subaru Impreza WRX STI has been a byword for exceptional real-world driving performance.  The latest model incorporates a wide range of developments which maintain the continual evolution of this iconic vehicle.

So synonymous are those six letters (WRX STI) with automotive exhilaration, that for this latest generation, the ‘Impreza’ moniker has been dropped and the new car will henceforth be known simply as the ‘Subaru WRX STI’.

In response to significant market demand the four-door saloon version of the Subaru WRX STI is once again available, after an absence of three years.  The hatchback variant will remain on sale, and this will consequently mark the first time that four- and five-door versions of the car have been sold alongside one another in the UK.

In order to refine its all-round performance, the 2011 WRX STI has been extensively tested under a wide variety of weather, traffic and road conditions, ranging from slow, congested city driving and rapid B-road sprints, to extreme ‘hot laps’ around famous racing circuits – including the notorious Nordschleife at the Nürburgring in Germany. 

The new WRX STI benefits from a stiffened bodyshell and an extensively reworked suspension system – based upon the marque’s widely praised ‘spec. C’ set-up.  Lower ride height and wider tyres also contribute to more direct and accurate control of the car and greater feedback for the driver. 

The more rigid bodyshell has also made it possible to increase suspension travel, benefiting road-holding as well as ride refinement.  An all-new design of wheel saves approximately two kilograms of un-sprung weight per corner compared to the outgoing model, helping to further improve ride and handling, as well as enhancing the car’s appearance.

Exterior styling is extensively revised, with new bumpers, enlarged rear quarter panels and lower ride height giving the car a more muscular presence.  Inside, the quality of the cabin materials has been upgraded, and the driver and passenger are assured of a secure and comfortable seating position thanks to the introduction of all-new RECARO bucket seats.

The widely praised 2.5-litre Subaru boxer 16-valve turbo engine with Dual Active Valve Control produces 300PS at 6,000rpm and massive torque – with a peak of 407Nm at 4,000rpm – even from low-revs.  While these outputs are unchanged from the outgoing STI, improved torque delivery throughout the rev range translates into better response and more linear acceleration.  The zero-to-62mph sprint is achieved in just 5.2 seconds. 

Significantly, the revised engine is cleaner – successfully meeting Euro 5 exhaust emissions standards.

Central to the agile handling of Subaru vehicles is the company’s legendary Symmetrical AWD (All-Wheel drive) system.  This consists of the horizontally-opposed boxer engine, with its intrinsic low centre of gravity, combined with advanced AWD technology incorporating sophisticated front, centre and rear differentials.  For the new WRX STI the system has been uprated, with revised settings for the differentials. 

The car features a default setting of 41 / 59 per cent front / rear torque distribution for optimum balance, and the driver can adjust this while on the move using the four-mode (Driver’s Control Centre Differential) system.  The WRX STI also incorporates Multi-Mode VDC (Vehicle Dynamics Control) – Subaru’s version of electronic stability control (ESC), allowing the driver to modify the point of intervention of this electronic driver aid to suit their own tastes.

In order to develop a vehicle that provides exceptional levels of high performance and precision handling, together with user-friendly daily motoring driveability on demand, Subaru has further tuned its three-mode SI-Drive (Subaru Intelligent Drive) system, which can be used to adjust the engine’s characteristics to best suit a variety of driving conditions.

Aficionados of Subaru performance vehicles will be cheered by the news that a new exhaust system, with a larger centre muffler and larger diameter piping, enhances the engine’s iconic boxer ‘burble’. 

Standard equipment includes keyless entry, push button start, front fog lamps, hill start assist, climate control air-conditioning, remote central locking, electric windows front and rear, and all-new radio-CD unit with a 10-speaker audio system, AUX/iPod and USB input jacks, hands-free Bluetooth® system, satellite tracker and cruise control.

STYLING AND DESIGN

Bolder stance, ‘wide and low’ look, heightened road presence

The new 2011 WRX STI design is based on a ‘wide and low’ concept – giving the car a more aggressive road presence.  It features more pronounced front bumpers and rear quarter panels to wrap around the wider 245/40 R18 tyres.  The exterior design incorporates a consistent flow of muscular lines from front to rear bumper, creating a distinctive identity, and endows both the new WRX STI saloon and hatchback with a more lithe and purposeful appearance.

The new saloon variant has an overall length of 4,580 mm (165 mm longer than the hatchback), while both bodystyles feature a 2,625 mm wheelbase and 1,795 mm overall width.

A completely refreshed front-end is distinguished by angular bumpers and a more prominent lip spoiler with intricate three-dimensional detailing.  The newly designed mesh grille is crowned by a blacked-out Subaru floating wing motif. 

The new saloon is a little sleeker than its hatchback sibling with an aerodynamic Cd of 0.34 – compared with the five-door model’s 0.36.  A new, larger and carefully profiled undertray optimises the aerodynamic performance of both model variants.

Both saloon and hatch feature a new exhaust system with a larger centre muffler and larger diameter 80mm piping tuned to enhance the engine’s iconic boxer ‘burble’.  The four-door WRX STI boasts a bespoke version of the polished stainless steel quad-tailpipes.  New, lighter 18-inch diameter, 8.5-inch wide alloy wheels with a multi-spoke design and high-lustre paint are fitted to both hatch and saloon as standard.

A new exterior body colour has been added to the 2011 WRX STI line-up: Plasma Blue Silica.  Five other hues, including Obsidian Black Pearl, Spark Sliver Metallic, Dark Gray Metallic, Lightning Red and Satin White Pearl, are also available.

INTERIOR

New design and materials improve cabin’s premium feel

For 2011, the WRX STI maintains its forebear’s sporty cockpit but now utilises new, higher-quality materials and fresh colours to create an even more engaging environment.  The new metallic colour schemes for the trim accents come in either a dark ‘cast metal’ or ‘sharply radiant’ silver finish.  These upgrades to the dashboard and door trim reinforce the impression of sportiness and elegance.

The front bucket seats feature a combination of Alcantara and leather and are designed to hold the driver and passenger comfortably and securely in place.  Jointly developed with RECARO, the new seats offer improved bolstering and back support, and their extended range of height adjustment enables users to select an even lower hip point, if desired.

In addition to housing the audio and cruise controls, the rake and reach-adjustable steering wheel now accommodates controls for the Bluetooth® system.  The vehicle information display, which constantly shows outside temperature, mileage and time, as well as the audio display, have been placed nearer the top of the dashboard for improved visibility and accessibility.

In the familiar tri-gauge instrument binnacle, drivers will find a large central tachometer located between the speedometer and fuel readout.  For 2011 the design has been simplified and the dials are now easier to read.  Upon start-up, the needles of the three meters briefly swing up to their maximum positions and quickly fall back, ‘welcoming’ the driver and highlighting the lively potential of the WRX STI.

The instrument cluster also comes with a rev indicator, DCCD Torque indicator and a ‘Shift-up’ indicator.  The centre stack is embellished with the STI logo, which is illuminated while the headlights are on.  The dial-control for the SI-Drive and the DCCD is mounted on top of the centre console, and red LED lights are used for interior door step lights. 

Standard equipment on the 2011 WRX STI includes: climate control air-conditioning, ventilation and heating ducts to the rear seat, remote central locking, electric windows (front and rear), radio-CD unit with a 10-speaker audio system, AUX/iPod and USB input jacks, hands-free Bluetooth® system, cruise control privacy glass, heated door mirrors, keyless entry and engine start button.

Practicality for everyday motoring

The compact design of the double wishbone rear suspension, fitted to both the hatchback and saloon versions of the WRX STI, ensures minimum intrusion into the interior and leaves room for a wider and deeper luggage compartment.

Hatchback models have boot capacity of 301 litres with the rear seats upright, which can be expanded to a highly competitive 1,216 litres with the seats folded.  In the 165mm longer saloon models, luggage capacity is increased by 40 per cent to 420 litres.  Both models are fitted with 60 / 40 split folding rear seats.

Storage space within the cabin includes two front cupholders in the centre console, a pocket for a 500ml bottle in each of the four doors, a centre console box with room for eight CD cases, and a dashboard console tray which provides space for small items such as wallets and mobile phones.

ENGINE AND TRANSMISSION

Fine tuning results in 300PS / 407Nm for even better performance

The horizontally-opposed ‘boxer’ engine is a long-established defining feature of Subaru vehicle technology, and has become inextricably linked to the Subaru brand.  This engine’s innate characteristics – light weight, compact and low configuration, high rigidity, and superb rotational balance – are key to building the unique sporting character of Subaru’s performance vehicles.

The engine development programme for the 2011 WRX STI started from this ideal base.  By fine tuning each individual technical element, Subaru’s engineers have created a special powertrain that delivers generous power output combined with improved environmental performance, complying with Euro 5 exhaust emission standards.

In its latest 2011 form, the 2.5-litre Subaru boxer 16-valve turbo engine with Dual Active Valve Control System produces 300PS at 6,000rpm and massive torque – with a peak of 407Nm at 4,000rpm – even from low-revs.  The engine spins rapidly and smoothly up to the red zone at 6,700rpm.  The improved torque throughout the rev range translates into better response and more linear acceleration, with the zero-to-62mph sprint achieved in just 5.2 seconds.

While achieving this performance, the revised engine successfully meets Euro 5 exhaust emissions standards. 

Features which enable the 2011 Subaru boxer engine to deliver this unusual blend of high performance with class-competitive fuel consumption and emissions include:

1.         Electronic Throttle Control (ETC)

An adaptable electronic, rather than physical, linkage between the accelerator and the engine’s throttle ensures accurate control of such a powerful engine, while also reducing fuel consumption.

2)         Dual Active Valve Control System (Dual AVCS)

Variable valve timing controls on both the intake and exhaust valves work precisely to optimise the cylinder charging and combustion efficiency throughout the rev range.  Benefits are better low-to-mid rev range torque, high-rev range power output and overall environmental performance.

3.         Intercooler

The capacity of the intercooler has been enlarged, thus improving the charging efficiency of intake air by reducing its temperature before it enters the engine.

4.         Centre muffler

The capacity of the new centre muffler in the exhaust system has been increased by changing its mounting from a longitudinal into a lateral location, making better use of the available space beneath the car. 

Environmental performance has been enhanced by the adoption of two new systems:

1.         Tumble Generation Valve (TGV)

This mechanism generates strong air stream ‘tumble’ inside the engine’s intake air system so that the air fuel mixture under cold conditions can be improved.  This results in cleaner exhaust emissions during cold start conditions.

2.         Secondary Air System

This system injects quantities of fresh air into the exhaust port while the engine is ‘cold’ so that non-burnt gases can be re-burnt.  It minimises hydro-carbon emissions and also helps to activate the catalyst quickly.

Multi-mode engine management

In order to develop a vehicle that provides exceptional levels of high performance and precision handling, together with user-friendly daily motoring driveability on demand, Subaru has fine-tuned its SI-Drive (Subaru Intelligent Drive) system to adjust the engine’s characteristics to best suit a variety of driving conditions.

SI-Drive enables the driver to choose three different engine mappings according to the driving environment or the driver’s mood.  From the most responsive and exhilarating performance mode, to smooth operating city drive mode (where owners can also benefit from lower fuel consumption), drivers can now enjoy the potential of the WRX STI engine in every situation.

Mode 1 – Intelligent

In this mode, the engine’s torque production character is more measured for a given accelerator depression so that smoother control of the vehicle is achieved.  A ‘shift-up’ indicator is activated (within the instrument cluster), to recommend the best gear change point for the enhanced fuel economy.  This mode is suitable whenever a delicate throttle control is needed, such as when driving on a congested road.  If the driver suddenly needs more performance, depressing the accelerator further will disengage ‘Intelligent mode’ and make maximum engine torque available.

Mode 2 – Sport

This mode sets the engine’s torque character to its most linear form, output relating directly to the position of the accelerator pedal.  This is an all-encompassing setting so that it can cover any driving conditions.

Mode 3 – Sport Sharp

The maximum potential of the WRX STI engine is fully released in this mode.  The torque production compared to the accelerator operation is set for the sharpest response, so that the driver can exploit the car’s quickest reactions to demanding driving situations.

Six-speed manual transmission

Based on Subaru’s in-house developed six-speed manual transmission, which has already gained a reputation for its precision and durability, the transmission for the 2011 WRX STI has been upgraded to ensure that using the manual shift plays a key role in maximising driving pleasure.

Transmission improvements included a triple-cone synchroniser on 1st gear, a reduction of 30 per cent in the force required to shift gear, and lowered internal friction within the gearbox by modifying the shift sleeves at 1-2, 3-4 and 5-6 shifting mechanism.

AWD DRIVETRAIN

Sophisticated AWD technology with multi-mode stability control

The key hardware at the very core of so many Subaru vehicles is the company’s legendary Symmetrical AWD (All-Wheel drive) system.  This consists of the horizontally-opposed boxer engine with its low centre of gravity combined with advanced AWD technology incorporating sophisticated front, centre and rear differentials.  For the 2011 WRX STI the system has been comprehensively updated, with differentials now incorporating revised settings. 

The mechanical centre differential system employs Subaru’s DCCD (Driver’s Control Centre Differential) system which controls the torque distribution ratio between the front and rear axles and features a default setting of 41 / 59 per cent front / rear for the optimum balance between agility and handling stability.

Drivers are offered a choice of four DCCD modes – three automatic and a manual mode – to best suit his or her preference or the road conditions and driving situations:

1.         AUTO Mode

This default mode can cover any road conditions and driving situations.

2.         AUTO+ Mode

Centre differential is kept tightened during the course of driving so that overall traction is maximised.  This mode is ideal for use in slippery conditions.

3.         AUTO- Mode

Centre differential is kept loosened during the course of driving so that sharp handling performance is maintained.  It is best used on the dry road conditions offering high levels of grip.

4.         Manual Mode

Differential can be set to ‘manual’ over a range of six steps. 

The front LSD is ‘Helical’ and its torque binding effect is minimal so that the driver can easily anticipate the reaction of the vehicle under threshold situations.

At the rear, the LSD is a ‘Torsen’ unit, which responds very quickly and has a torque binding effect which is obtained smoothly to give drivers maximum ease of control.

The ‘Multi-Mode VDC’ (Vehicle Dynamics Control) system fitted to the WRX STI is Subaru’s comprehensive electronic stability control (ESC) system, with variable settings that can change the point of ‘intervention’ to ensure maximum driving pleasure.

The VDC system reduces engine power and / or applies one or more brakes to correct excessive understeer or oversteer to keep the car on the course intended by the driver.  To provide more handling options to WRX STI drivers, the 2011 model offers three modes:

1.         NORMAL Mode

This default mode is fully automatic and suitable for all road conditions and driving situations.  VDC uses the ABS (Anti-lock Brake System), TCS (Traction Control System) and Stability Assist to deliver maximum stability.

2.         TRACTION Mode

Activation of the TCSS is limited to allow drivers to exploit their car’s performance without electronic intervention until greater slip and yaw angles have been reached.

3.         OFF Mode

TCS and Stability Assist can be deactivated, while the ABS remains fully functional.  This mode is useful when tackling extremely slippery conditions like deep snow or mud, when some wheelspin is an aid to progress when setting off from standstill. 

CHASSIS AND RUNNING GEAR

New ‘spec. C’ suspension creates the ‘best-ever’ handling for Subaru

Engineers on the WRX STI chassis development programme worked towards the Subaru Dynamic Chassis Control Concept (DC3).  The concept aimed to exploit the benefits of the 2011 model’s more rigid bodyshell to adopt more compliant suspension settings and ensure that all four tyres contribute to accelerating, turning and braking the car to optimum effect for a truly dynamic driving experience. 

The most significant of the changes is the introduction of Subaru’s widely praised ‘spec. C’ suspension, which has improved handling response, manoeuvring precision and road-holding ability.  The changes to the spring rates and stabilisers, combined with a lowering of the ride height by 5mm, have greatly improved roll stiffness.  These modifications, together with the fitting of wider, lower-profile 245 / 40 R18 tyres as standard, have helped secure an increase in maximum lateral-G.  The new model’s 1,505kg kerb weight is distributed 58 / 42 per cent front / rear.

The MacPherson strut front suspension has been uprated with the adoption of pillow-ball-type rear-end bushes in the lower arms – a first for production Subaru models.  This introduction greatly enhances longitudinal and lateral stiffness, making the steering feel even more assured and responsive. 

The road-holding ability of the front tyres has been greatly improved by optimising the suspension geometry, including toe and camber angles, as well as by increasing the suspension travel.  The front spring rates have been raised 15.6 per cent and the stabiliser bar diameter increased by 5 per cent to 21mm.

At the rear, the suspension’s sub-frame bushes were changed to improve camber stiffness, resulting in heightened responsiveness and increased road-holding capability.  Double wishbones are employed and superior road-holding has been achieved by optimising the geometry and by increasing travel.  Spring rates are up by 53 per cent and the stabiliser bar is thicker – 19mm compared to 18mm on previous models.

The 2011 WRX STI’s steering is a quick-ratio rack and pinion system with hydraulic speed-sensitive variable power assistance, requiring 2.8 turns of the steering wheel lock-to-lock, with an 11.0 metre turning circle.

Brembo all-ventilated disc braking system

To meet drivers’ demanding expectations for such a high performance model, an immensely powerful, all-ventilated disc braking system for the WRX STI has been jointly developed by Subaru and the famous Italian motorsport and supercar brake specialists, Brembo.  The response and controllability of the new brake system have been improved, with super-low expansion brake hoses, a tie-rod type brake booster, optimised master cylinder design and an enhanced brake pedal mechanism. 

The ventilated front discs measure 326 x 30mm and feature four-pot calipers.  The rear discs, also ventilated, are 316 x 20mm units, equipped with twin-pot calipers.

The braking system is supported by electronic aids to ensure maximum retardation, including: Super Sports ABS – a high performance anti-lock system with an additional lateral G-sensor to monitor yaw-rates; EBD (Electronic Brake Force Distribution) which compensates for differing weight distribution depending on the number of passengers, luggage, etc; and Brake Assist which detects an emergency situation and delivers maximum stopping power.

The 2011 WRX STI is fitted with new, lightweight 18 x 8.5J cast aluminium wheels, finished in high-lustre silver paint.  The weight saving is approximately two kilograms per wheel, compared to previous Subaru wheels, reducing un-sprung weight which benefits ride and handling.  Dunlop SP600 (245 / 40 R18) tyres were chosen for their high levels of grip and well-balanced performance in both dry and wet conditions.

STRUCTURE AND SAFETY

Circular links enhance bodyshell strength and occupant protection

The new 2011 WRX STI uses an advanced form of Subaru’s ‘Ring-Shaped Reinforcement Frame Body Structure’ (RSR) which results in a stronger and stiffer bodyshell compared with earlier Impreza models, and delivers benefits in terms of handling, ride, refinement and impact resistance.

Following the RSR engineering philosophy, the A-, B- and C-pillars are reinforced and the pillars on each side of the car are joined by cross members at both the roof and floor levels to create a series of ‘circular links’ (or rings) which ensure high levels of occupant protection.  A higher percentage of ultra-high-strength steel is used at key locations in the new bodyshell to achieve strength without adding significantly to overall weight.

Thanks to this advanced construction technique, the WRX STI achieves high levels of safety and crash worthiness by absorbing and dispersing impact energy in frontal, side, and rear crashes.  As well as looking after the car’s occupants, the car’s bonnet is specifically designed to disperse the energy of a pedestrian impact and to minimise injuries.

For optimum visibility when driving at night, the 2011 WRX STI comes equipped with Xenon high-intensity discharge headlamps and pop-up headlamp washers as standard.

All models are equipped with dual front, side and curtain airbags, as well as three-point seat belts in the front and rear.  A collapsible brake pedal reduces the risk of driver foot injury in frontal accidents.  In the rear, the seat accommodates two ISOFIX-compatible child safety seat mountings.

While the highly specified Brembo braking system takes care of stopping, electronic assistance is also available when setting off.  In addition to traction control, the 2011 WRX STI is equipped with a ‘Hill Start Assist’ system that maintains brake pressure for approximately one to two seconds after the brake pedal is released to prevent roll-back and assist the driver in making a smooth take-off on gradients.

EQUIPMENT

The table below details the full list of standard equipment (and options) fitted to both the four-door saloon and five-door hatchback 2011 Subaru WRX STI.

Item

WRX STI

Four-door

Five-door

Exterior

ã??

ã??


HID low beam headlamps

  •  

  •  


Pop-up type headlamp washers

  •  
  •  


Front fog lamps

  •  
  •  


Rear fog lamp

  •  
  •  


Power-folding door mirrors with built-in LED turn signal

  •  
  •  


Designed blade, variable intermittent windshield wipers

  •  
  •  


Intermittent rear window wiper

        _

  •  


18-inch  aluminium alloy wheels (High-lustre)

  •  
  •  


Carrier installation brackets

  •  
  •  


Floor under cover

  •  
  •  


Side under spoilers

  •  
  •  


Rear diffuser

        _

  •  


Large roof spoiler (five-door)

        _

  •  


Roof antenna

  •  
  •  


Privacy glass for rear doors, rear quarters and rear window

  •  
  •  


Twin dual tail muffler

  •  
  •  

 

Seating / trims

 

 


Leather wrapped steering wheel with red stitching

  •  
  •  


Leather wrapped gearshift knob and hand brake lever

  •  
  •  


Sporty front seats with red stitching (Alcantara*)

  •  
  •  


RECARO front seats with red stitching (Alcantara*)

  •  
  •  


Manual seat lifter (driver’s seat only)

  •  
  •  


60 / 40 split folding rear seats (four-door: Trunk through)

  •  
  •  


Plated inner door handles

  •  
  •  


Metal door step panels (front, both sides)

  •  
  •  

 

Comfort / convenience

ã??

ã??


Power windows*2

  •  
  •  


Remote control key system

  •  
  •  


Keyless Access and Push Button Start System

  •  
  •  


Map lamps

  •  
  •  


Trunk room lamp(4-Door) / Luggage space lamp(5-Door)

  •  
  •  


Vanity mirrors with lids (for driver and front passenger)

  •  
  •  


Centre tray with lamp

  •  
  •  


Centre console box

  •  
  •  

 


Front cup holders (in the centre console)

  •  
  •  


Door pockets with bottle holders (on all side doors)

  •  
  •  


Interior fuel lid lock release

  •  
  •  


Two 12-volt power outlets (in the instrument panel and centre console box)

  •  
  •  


Retractable cargo cover

        _

  •  

 

Temperature control

ã??

ã??


Automatic air-conditioning system with anti-dust filter

  •  
  •  


Heater ducts for rear passengers

  •  
  •  


Windshield wiper de-icer

  •  
  •  


Heated door mirrors

  •  
  •  


Front and side defrosters

  •  
  •  


Electric rear window defogger with timer

  •  
  •  

 

Entertainment and navigation

ã??

ã??


2-DIN audio: 1-CD with 10 speakers

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Steering wheel mounted audio remote control switches

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Auxiliary audio and USB/iPod input jack (in the centre console box)

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Bluetooth®*3 compatible hands-free system

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Control / Instruments

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Electro-luminescent gauges

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Driver-set rev indicator

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Information display*4

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Quick ratio power steering

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Tilt-adjustable/telescopic steering wheel

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Cruise control

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Aluminium pedals

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Drivability

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SI-DRIVE (SUBARU Intelligent Drive)

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Multi-mode Vehicle Dynamics Control System

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Multi-mode DCCD (Driver’s Control Centre Differential)

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Hill Start Assist

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Brembo brakes (front and rear)

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Safety

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Front SRS*5 airbags

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Front side SRS*5 airbags (for driver and front passenger)

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Curtain SRS*5 airbags (front and rear, both sides)

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Side-door reinforcement beams (front and rear, both sides)

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Steering column support beam

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Rear seat headrests for three seating positions

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Seatbelt indicator (for driver)

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Front seatbelts with pretensioners and load limiters

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Height adjustable seatbelt anchors (for driver and front passenger)

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Rear three-point seatbelts for 3 seating positions

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Safety brake pedal system

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Four-sensor / four-channel Super Sports ABS with Electronic Brake-force Distribution

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Brake assist system

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ISO-FIX adapted child seat anchors (with tether anchors)

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Child-proof rear door locking (both sides)

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Anti-theft security system with engine immobiliser

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Satellite security tracker system

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Security window etching

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* Alcantara® is a registered trademark of Alcantara S.p.A.
*1 Synthetic leather (PVC) is used for some parts of seats' upholstery
*2 Driver's side front window has auto up/down function with pinch protection
*3 Bluetooth® is a registered trademark of Bluetooth SIG, Inc. America
*4 It shows: current fuel consumption, average fuel consumption, ambient temperature and clock
*5 SRS: Supplemental Restraint System. Must be used in conjunction with seatbelts

 

02/01/13

 

1

2011 WRX STI

Body and chassis
Four-door saloon or five-door hatchback, bodystyles, with all-steel unitary construction bodyshell.  Longitudinally-mounted petrol engine driving the front and rear wheels – Subaru All-Wheel Drive (AWD) – via a six-speed manual transmission. 

Engine
2.5-litre 300 ps ‘Boxer’

Type                                        DOHC, horizontally-opposed, four-cylinder with 16 valves, Dual AVCS and high-boost turbocharger
Capacity                                  2.5-litre, 2457cc
Max power                              300ps (296.4 bhp) @ 6,000rpm
Max torque                              407Nm (300.2 lbs. ft) @ 4,000rpm
Bore x stroke                          99.5 x 79mm
Compression ratio                  8.2:1
Fuel system                           Multi-point fuel injection
Construction                          Aluminium cylinder-block and head
Emissions class                    Euro 5

Transmission
Type                                       Six-speed manual
Gear ratios
1st                                         3.636:1
2nd                                        2.235:1
3rd                                        1.590:1
4th                                         1.137:1
5th                                         0.891:1
6th                                         0.707:1
Reverse                                3.545:1
Final Drive                            3.900:1 (Front)

                                              3.545:1 (Rear)

Drivetrain

All-Wheel Drive (AWD)        Delivers 41 / 59 per cent of torque to the front / rear wheels as default setting. 
                                             Safety aided by electronic TCS (traction control system),
                                             ABS (anti-lock braking system) and VDC (Vehicle Dynamics Control) system
                                             with Hill-start Assist Control.  
                                             Four-mode centre differential.  
                                             Helical front differential.  Torsen rear differential.

 

Suspension and damping
Front                                     Fully independent by MacPherson Struts, with coil springs and gas-filled shock absorbers.  
                                              21mm diameter anti-roll stabiliser bar.

Rear                                     Fully independent by double wishbones, with coil springs and gas-filled shock absorbers.
                                             19mm diameter anti-roll stabiliser bar.

Steering
Type                                      Hydraulic power-assisted rack and pinion
Gearing                                2.8 turns lock-to-lock
Turning circle                     11.0 metres

Brakes
Front                                     326 x 30mm ventilated discs with four-pot calipers
Rear                                     316 x 20mm ventilated discs with two-pot calipers
Parking brake                     Hand-operated lever

ABS                                       Four-channel anti-lock system with EBD

BAS (Brake Assist System)   Boosts braking power during emergency stops

Wheels and tyres
Standard                                Alloy 18-inch x 8.5J with 245 / 40 R18 tyres

Spare (Standard)                 Space saver, T135 / 70 D17

Exterior dimensions (mm)
Overall length                        4,580 (saloon)             4,415 (hatchback)

Overall width*                        1,795                                      
Overall height                        1,470
Wheelbase                             2,625
Front track                              1,530
Rear track                               1,540
Ground clearance                 150

*excluding door mirrors

Capacities
Fuel tank                                 60 litres 

Luggage (VDA)                      420 litres (saloon)        301 litres (hatchback, rear seats up) 
                                                                                           1,216 litres (rear seats folded)

Weights
Kerb weight                            1,505 kg (saloon and hatchback)
Weight distribution                58 / 42 per cent front / rear

Performance
Top speed / mph                  158 (saloon)                155 (hatchback) 
0-to-62 mph                           5.2 sec

Fuel economy
Combined cycle                    26.9 mpg
CO2                                         243 g/km

Aerodynamics
Cd                                           0.34 (saloon)               0.36 (hatchback)

 

HISTORY

WRX STI timeline

1992                Subaru Impreza launched in Japan.  Introduced to replace the Legacy after a                  
                          rule change in the World Rally Championship (WRC).

1994                Subaru Impreza Turbo officially launched in the UK. 

1995                Subaru won the World Rally Championship in a 555-branded WRC Impreza driven by the
                          late Colin McRae. It marked the first time a British driver had won the WRC.

1995                To celebrate Subaru’s success in WRC the McRae Series Impreza was released. 
                         Additions included sports seats, eye-catching alloy wheels and a special new colour.  

1997                Subaru won a hat-trick of manufacturer championships and celebrated this by releasing a new
                         special edition – Subaru Impreza Terzo.

1997                A special two-door coupe was released in the Japan Domestic Market. 
                         This was later used as the platform for the 1998 WRC car.

1998                The 345bhp 22B STI was introduced to commemorate the Subaru’s 40th anniversary.

2001                Subaru unveils the STI Type UK, which was offered with an optional Prodrive Performance
                          Package (PPP).

2002                The Impreza STI range received a range of cosmetic upgrades, with power levels unchanged.  

2004                The revisions in 2004 saw the standard STI Type-UK receive mechanical revisions,
                         as per its Japanese counterpart. 

2007                Debuted at the Tokyo Auto Show in October 2007, the “wide-body” hatchback Impreza STI left the
                         factory with 300bhp. 

 

-ENDS-

02/01/13

ACCORDION TITLE

ACCORDION CONTENT

ACCORDION TITLE

ACCORDION CONTENT

Releases

subaru wrx sti to participate in n®rburgring 24-hours

Subaru is pleased to announce that its motorsports subsidiary, Subaru Tecnica International (STI), will participate in the 45th Nürburgring 24-Hour Race to be held at the Nürburgring in the Eifel region of Rhineland-Palatinate, Germany, on May 25-28, 2017, entering a vehicle based on Subaru WRX STI.

subaru reveals all-new wrx

The all-new Subaru WRX, the latest in a line of sports saloons from the Japanese brand, today made its world premiere at the 2013 Los Angeles Motor Show.

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