Subaru WRX STi

Assetto Corsa Subaru WRX STi 2016 Varis Kit

This model retains the same engine as the previous generation STI, which is a 2.5-liter EJ257 with dual AVCS however with modifications to the ECU which have increased fuel economy slightly, and has given a 6 kW (8.0 hp) boost in power to 227 kW (305 HP). Torque, however, has dropped from 407 N⋅m (300 lb⋅ft) to 394 N⋅m (291 lb⋅ft) at 4,000 rpm and top speed is now 160 mph (258 km/h).

There are also reports that along with the ECU changes, the rev limit was raised to 7,100 rpm to support the power increase at the upper rev range to support a stronger top end. It also retains a hydraulic power steering system as opposed to the WRX’s new electric-assisted rack. The steering rack was changed to a quicker 13:1 ratio, as used in the Japan delivered vehicles, as opposed to the 15:1 ratio of the previous models. Also, the 2.0-liter EJ207 that is standard for Japanese STIs was retained specifically for the Japanese market in the new 2015 WRX STI.

Credit: Hitachi Media