Subaru and Prodrive have united to produce a modified WRX STI to smash the car lap record around the Isle of Man TT course. I was lucky enough to get up close and personal with the car to see what components make up a car capable of getting around the island at a 128.7mph average speed.
After setting the car lap record for the Isle of Man TT course back in 2014, Subaru decided to not just beat its own record, but to smash it. Calling upon the company’s old alliance with Prodrive, a bespoke time attack-style car based upon the WRX STI was specially designed and manufactured for this year’s TT, where the car has already blown the lap record into smithereens. We headed over to the Isle of Man to take a closer look at this beast, which will take one final record attempt scheduled this Friday.
It has double the standard horsepower
The many demonstrator WRX STIs on display at the Isle of Man TT were not to be sneered at, producing 296bhp from their turbocharged 2.0-litre flat-fours which make for a 0-62mph time of 5.2 seconds. But Prodrive has completely torn up the rule book, with the TT Challenge car producing 592bhp using a single Garrett turbocharger rated at 2 bar of pressure.
The turbocharger is specially designed to keep maximum boost throughout the rev range, giving rally driver Mark Higgins full access to the monstrous powerplant. Subaru stated that the engine is capable of a slightly higher power setting (spitting out over 600bhp), but the probability of overheating would become an issue on the 37.7 mile TT course.