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Subaru Impreza STI CS400 by Cosworth

Subaru Impreza STI CS400 by Cosworth

Subaru Impreza STI CS400 by Cosworth

Subaru Impreza STI CS400 by Cosworth interior

Year 2010
Engine 2.5 litre, flat 4 cylinder, turbo
Transmission 6 speed manual AWD
Max speed 155 mph
0-60 mph 3.7 seconds
Horsepower 395 hp @ 5,750 rpm
weight -

Since its introduction the Subaru Impreza STI has always been a performance bargain. Capable of leaving far more expensive and exclusive cars in its dust, it dominated the WRC for years and has been a hot favorite for many track day enthusiasts. Now Subaru has teamed up with another company famed for its racing and engineering know-how.

The Subaru Impreza STI CS400 was developed in conjunction with the British engineering company Cosworth. And its not just a simple air-filter and sports exhaust upgrade either. Cosworth have pretty much replaced all the moving bits in the engine. There's new high performance pistons, new connecting rods, high-pressure oil pump, and sturdier gaskets and bearings. To take advantage of the upgraded internals the ECU has been recalibrated, and the turbocharger and wastegate modified. And yes, there's also a custom sports exhaust.

All these changes result in a power hike of nearly 100 horsepower - taking the total to 395 hp @ 5,750 rpm. The torque figure stands at 398 lb-ft (535 Nm). The 0-60 mph time has been slashed from 5.2 seconds to a blistering 3.7 seconds. Top speed is an electronically limited 155 mph.

The chassis of the Subaru Impreza STI CS400 has also been worked over through a joint effort by Cosworth, Eibach and Bilstein. It sits 10mm lower to the ground, has an 18 mm wider track, and also larger AP Racing brakes.

Styling tweaks include a revised front bumper, Cosworth badges, unique 18 inch wheels, and a new rear spoiler. The interior gets Recaro sports seats, gloss black trim, and some more Cosworth badges.

Unfortunately all this performance comes at a price. Only 75 examples of the Subaru Impreza STI CS400 are scheduled to be built. All for the UK market, and all carrying a £49,995 ($70,000) price tag.

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