Limited edi­tion Cos­worth

The Peterborough Evening Telegraph - - Motors Today -

COS­WORTH plus Im­preza is sure to equal an ex­plo­sive mix of power and per­for­mance.

So it is that the first Cos­worthde­vel­oped road car since 1996, the Cos­worth Im­preza STI CS400 pumps out 400PS, is all-wheel drive and delivers a 0-62mph time of just 3.7 sec­onds. But you’d bet­ter note that there is a limited edi­tion run of 75 cars ex­clu­sively for the UK mar­ket. They are on sale priced from £49,995 on the road.

The Cos­worth-tuned, tur­bocharged ve­hi­cle is one of the world’s most ac­cel­er­a­tive hatch­backs. 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, cov­ers a quar­ter mile in 12.75 sec­onds at a ter­mi­nal speed of 107mph. Top speed is limited to 155mph.

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.

At the heart of the new car is a heav­ily re­vised ver­sion of the mar­que’s Boxer en­gine. The “flat-four” power unit is re­moved from the car, hand fin­ished, and sev­eral in­ter­nal and an­cil­lary com­po­nents are re­placed with up-rated items, spec­i­fied by Cos­worth.

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.

The over­all re­sult is a huge in­crease in torque higher up the rev range, and sig­nif­i­cantly im­proved in-gear ac­cel­er­a­tion. This not only makes the Im­preza more tractable for day-to-day road use, but also a far sharper tool on the race track. Man­ual trans­mis­sion and All-Wheel Drive sys­tem

To han­dle the in­creased power of the Cos­worth-tuned en­gine, the Im­preza STI’s six-speed man­ual trans­mis­sion has car­bon syn­chro­mesh ap­plied to the top three ra­tios and a short throw link­age for quicker shift­ing.

The full-time All-Wheel-Drive trans­mis­sion with front and rear limited-slip dif­fer­en­tials, fea­tures a 50/50 front to rear torque split as the de­fault, how­ever, the torque split is var­ied elec­tron­i­cally ac­cord­ing to chang­ing con­di­tions.

Im­prov­ing the Cos­worth Im­preza’s han­dling, steer­ing feel and driver feed­back – with­out com­pro­mis­ing ride com­fort – was a pri­mary tar­get for the devel­op­ment team.

Re­tain­ing Subaru’s orig­i­nal sus­pen­sion lay­out and ma­jor com­po­nents, Cos­worth and a team of chas­sis en­gi­neers col­lab­o­rated with Bil­stein and Eibach tech­ni­cians to tai­lor a ride/han­dling/steer­ing pack­age that was ide­ally matched to the new model’s in­creased per­for­mance.

Up­graded “rac­ing” brakes have en­hanced stop­ping power.

The out­stand­ing per­for­mance of the Cos­worth Im­preza is re­flected in its stand-out ap­pear­ance and stan­dard Xenon head­lamps. The low­ered ride height and wider track give the car a whole new stance, which is re­in­forced by a front bumper that now in­cor­po­rates fog lights, a new front lip spoiler, and up­per and lower mesh grilles. Also added is a new rear boot-lid spoiler.

In­side, the sporty new Re­caro front seats, the rear seats and steer­ing wheel are all re-trimmed in Cos­worth-branded black leather. Also distin­guish­ing the CS400 are Pi­ano Black cen­tre stack and trim ac­cents, and the fit­ment of pri­vacy glass. Stan­dard fea­tures car­ried-over from the WRX STI model in­clude: LED (light-emit­ting diode) tail lamps, front and rear elec­tric win­dows, 10-speaker, six-disc ra­dio/CD player, satel­lite nav­i­ga­tion, Smart-en­try and push­but­ton start, plus front, side and cur­tain airbags.

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