2011 Subaru Impreza STI Cosworth CS400

The new Subaru Impreza STI Cosworth CS400 is the result of one of the most eagerly anticipated automotive collaborations in recent times. The production will be restricted to 75 cars. The Cosworth-tuned, turbocharged vehicle is one of the world’s most accelerative hatchbacks.

Powered by the renowned 2.5-litre turbocharged ‘Boxer’ engine is transformed to produce 33 per cent more power, drawing heavily on Cosworth’s extensive Formula 1 experience. The engine, which drives all four wheels via a six-speed manual gearbox, boasts an impressive 400 ps and the new model reaches 62 mph in just 3.7 seconds, going on to cover a quarter mile in 12.75 seconds at a terminal speed of 107 mph. Top speed is limited to 155mph.

Offer some 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.

Other, as with all Impreza ‘Boxer’ engines, the STI Cosworth unit features twin overhead camshafts per cylinder bank (DOHC) plus an Active Valve Control System (AVCS) to deliver variable valve timing and enhance low-speed pulling power.

For marketed exclusively in the UK in right-hand drive form, the Subaru Impreza STI Cosworth CS400 is available in a choice of three exterior colours (Spark Silver, Dark Grey and San Remo Red), and is priced from £49,995 on-the-road.

TECHNICAL SPECIFICATIONS

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
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