German magazine SportAuto puts the new BMW M3 and M4 through the dyno test and the results show 465 hp / 577 Nm (425 ft lb).
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Looking at the chart below, we can see a reliable torque and HP curve above 3200 RPMs. See the full chart:
The new BMW M3 and M4 are powered by the S55 3.0 liter inline-six TwinPower engine producing 425 horsepower and 406 lb-ft of torque. The power is sent to the rear-wheels via a six-speed or an optional 7-speed M DCT transmission.