Autobild TV  pits the BMW i8 vs. BMW M4 on a straight line, unlikely competitors, to see which one is faster. The BMW M4 has a 3.0-liter BMW M TwinPower Turbo engine with 425 hp and  550 Nm (406 lb-ft) of torque. BMW i8 has a plug-in hybrid system consisting with a turbocharged three-cylinder BMW TwinPower Turbo petrol engine and BMW eDrive technology in the form of an electric drive system. So which one is faster?
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