Although Subaru didn't invent flat engines, and isn't the only automaker still using them, those motors have become a defining characteristic of the brand. (The same can be said for all-wheel drive, ...

This Subaru Impreza STi runs a stroker EJ20 engine producing over 800 horsepower, revving to 8500rpm. Onboard footage captures flat shifting through a sequential gearbox, aggressive boost response and ...