The exception is the latest performance range-topper, the M135i xDrive ... and offers more power than the BMW and AMG at 328bhp, with Volkswagen's Golf R offering up 316bhp.

Power output remains at 302bhp and 332lb ft of torque, leaving its 0-62mph time at the same 4.8sec and top speed at 155mph – these figures put it a tenth behind the Volkswagen Golf R in terms of ...