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.
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.
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]
