The 2020 BMW M850 is available as a 2-door, 4-seat coupe. Starting at $111,900, the 2020 BMW M850 Coupe is powered by a 4.4L, 8-cylinder engine mated to an automatic transmission that returns an EPA estimated 18-mpg in the city and 25-mpg on the highway. The top of the line 2020 BMW M850 Convertible, priced at $121,400, is powered by a 4.4L, 8-cylinder engine mated to an automatic transmission that returns an EPA estimated 17-mpg in the city and 25-mpg on the highway.