The new 2015 BMW M3 and M4 are rated by BMW to produce 425bhp at the crank from it’s new 3.0L TwinPower turbo inline-six and with a typical account for a 10 percent drivetrain loss, the amount of power at the wheels should be around 382hp.
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Though BMW has a history of underrating their engines to a great degree. So that said, a quick trip to the dyno should reveal what the M3 and M4 are actually producing power wise.
Check out the findings from CarScoops after the jump.