With its 382-hp twin-turbo inline-six, BMW’s semi-spicy compact sedan lives life on fast forward.
A weird sort of identity crisis has been afflicting the big three German luxury manufacturers. Audi, BMW, and Mercedes have been busy blending elements of each others identity into their own, and the latest example is BMW purloining “absurd horsepower” from Mercedes-AMG’s personality profile. The M5 Competition makes 617 horsepower. You can get a 503-hp inline-six in the X3 M and X4 M, and even in the humble 3-series, the not-quite-full-M-treatment 3.0-liter inline-six makes 382 horsepower in the M340i tested here.