The 2021 BMW M4 is available as a 2-door, 4-seat coupe. Starting at $71,800, the 2021 BMW M4 Base (M6) is powered by a 3.0LL , 6 -cylinder engine mated to a manual transmission that returns an EPA estimated 16-mpg in the city and 23-mpg on the highway. The top of the line 2021BMWM4Competition (A8) , priced at $ 74,700 , is powered by a 3.0LL , 6 - cylinder engine mated to an automatic transmission that returns an EPA estimated 16-mpg in the city and 23-mpg on the highway.