The 2016 BMW M6 is available as a 2-door, 4-seat coupe. Starting at $113,400, the 2016 BMW M6 Coupe is powered by a 4.4L , 8 -cylinder engine mated to an automatic transmission that returns an EPA estimated 14-mpg in the city and 20-mpg on the highway. The top of the line 2016BMWM6Convertible , priced at $ 119,700 , is powered by a 4.4L , 8 - cylinder engine mated to an automatic transmission that returns an EPA estimated 14-mpg in the city and 20-mpg on the highway.