The 2007 BMW M6 is available as a 2-door, 4-seat coupe. Starting at $104,900, the 2007 BMW M6 Convertible is powered by a 5.0L, 10-cylinder engine mated to an automatic transmission that returns an EPA estimated 12-mpg in the city and 19-mpg on the highway. The top of the line 2007 BMW M6 Coupe, priced at $99,100, is powered by a 5.0L, 10-cylinder engine mated to an automatic transmission that returns an EPA estimated 12-mpg in the city and 18-mpg on the highway.