The 2018 BMW M4 is available as a 2-door, 4-seat coupe. Starting at $68,700, the 2018 BMW M4 Coupe is powered by a 3.0L, 6-cylinder engine mated to amanual transmission that returns an EPA estimated 17-mpg in the city and 25-mpg on the highway. The top of the line 2018 BMW M4 Convertible, priced at $77,200, is powered by a 3.0L, 6-cylinder engine mated to amanual transmission that returns an EPA estimated 17-mpg in the city and 25-mpg on the highway.