Cosworth Tuned Subaru WRX STI info

Cosworth Impreza STI CS400


Legendary tuner Cosworth has collaborated with Japanese car maker Subaru to develop the Cosworth Impreza STI CS400 based on the Impreza WRX STI 'hot-hatch'.

The first genuine Cosworth-developed road car since 1996, the Cosworth Impreza STI CS400 is powered by a heavily tweaked 2.5-litre turbocharged ‘Boxer’ engine that produces 33 per cent more power than the donor car. Ddrawing heavily on Cosworth’s extensive Formula 1 experience, the engine, which drives all four wheels via a six-speed manual gearbox, boasts an impressive 294 kW and a 0-100 km/h time of just 3.7 seconds, making it one of the world's most accelerative hatchbacks. The quarter mile is covered in a brisk 12.75 seconds at a terminal speed of 172 km/h. Top speed is limited to 250 km/h.
Cosworth Impreza STI CS400


The Cosworth Impreza STI CS400 features an extensive range of Cosworth-engineered components in the engine, turbo system, exhaust, suspension, brakes and wheels, plus subtle improvements to the exterior and interior styling to create a truly distinctive high performance car with everyday hatchback practicality.

Available in a choice of three exterior colours - Spark Silver, Dark Grey and San Remo Red - the Cosworth Impreza STI is, quite sadly, for the UK market only and is priced from £49,995 (AU$86,727). Only 75 units will be produced.

Cosworth Impreza STI CS400 interior


TECHNICAL SPECIFICATIONS
New Cosworth Impreza STI CS400

Body and Chassis
Five-door, five-seat hatchback, with all-steel unitary construction body shell. Longitudinally-mounted petrol boxer engines driving the front and rear wheels (AWD) via a six-speed manual transmission.

Engine
STI 2.5-litre / 400 PS
Name – Subaru Boxer
Type – DOHC, horizontally opposed ‘flat four’
Capacity – 2.5-litres, 2457 cc
Bore & Stroke – 99.5 x 79.0 mm
Compression ratio – 8.2:1
Max power – 400 PS (295 kW) @ 5,750 rpm
Max torque – 542 Nm (400 lb.ft) @ 3,950 rpm
Valves – 16 (4-per-cylinder) with Dual AVCS
Fuel system – Multi-point injection
Construction – Aluminium cylinder block and heads
Emissions class – Euro Stage 5

Transmission
Manual, Six-speed

Gear Ratios
1 – 3.636:1
2 – 2.235:1
3 – 1.590:1
4 – 1.137:1
5 – 0.891:1
6 – 0.707:1
Reverse – 3.545:1
Final Drive (rear) – 3.900:1

Drivetrains
Full-time all-wheel drive with centre differential and viscous coupling, plus Vehicle Dynamics Control, Rear limited-slip differential, Front limited-slip differential and Si-Drive adjustable centre differential

Suspension & Damping
Front – Fully independent subframe-mounted MacPherson Struts, with Eibach coil springs and gas-filled Bilstein shock absorbers. Anti-roll stabiliser bar
Rear – Fully independent subframe-mounted Multi-Link, Eibach coil springs and Bilstein gas-filled shock absorbers (adjustable) anti-roll bar

Steering
Type – Electric power-assisted rack & pinion
Gearing – 2.5 turns lock-to-lock
Turning circle (m) – 11.0

Brakes
Front – 355 x 32 mm ventilated discs with 6-pot callipers
Rear – 316 x 20 mm vented discs with single-pot callipers
ABS – Four-Channel anti-lock system with EBD

Wheels & Tyres
Alloy 18 x 8.5 inch, with 245 / 40 R18 directional tyres

Dimensions (mm)

Exterior
Overall length – 4,415
Overall width – 1,795*
Overall height – 1,475
Wheelbase – 2,625
Front track – 1,530
Rear track – 1,540
Ground clearance – 140
*excluding door mirrors

Interior (all models)
Headroom – 1,024 front / 951 rear
Legroom – 1,091 front / 960 rear
Shoulder room – 1,430 front / 1,426 rear
Hip room – 1,384 front / 1,370 rear

Capacities (all models)
Fuel tank – 60 litres
Luggage (VDA) – 301 litres (rear seats up) / 1,216 litres (rear seats down)

Weights (kg)
Curb weight (min.) – 1,505
Gross weight – 1,980

Performance
Top speed / mph – 155 (electronically limited
0-to-62 mph / sec – 3.7

Fuel Economy (mpg)
Combined cycle – [tbc]
CO2 g/km – [tbc]