Dec 29, 2020 · BMW M4 Driver Brakes From 174 MPH, Narrowly Misses Rear-Ending Mazda3 The driver of the BMW M4 managed to slow down from 174 mph to 87 mph. December 30, 2020 at 7:43 pm The M4 CS also sees BMW M GmbH introducing a new nomenclature for its models. Positioned above the standard M models will be the performance-boosted Competition The 3.0-litre high-performance engine raises the output of the M4 with Competition Package by 10 horsepower, to 460 hp.