The 2020 BMW M4 is available as a 2-door, 4-seat coupe. Starting at $69,150, the 2020 BMW M4 Base (M6) Coupe is powered by a 3.0L, 6-cylinder engine mated to a manual transmission that returns an EPA estimated 18-mpg in the city and 25-mpg on the highway. The top of the line 2020 BMW M4 Convertible, priced at $77,650, is powered by a 3.0L, 6-cylinder engine mated to a manual transmission that returns an EPA estimated 17-mpg in the city and 25-mpg on the highway.