The 2006 BMW M is available as a 2-door, 2-seat coupe. Starting at $51,300, the 2006 BMW M Roadster is powered by a 3.2L , 6 -cylinder engine mated to a manual transmission that returns an EPA estimated 16-mpg in the city and 24-mpg on the highway. The top of the line 2006BMWMCoupe , priced at $ 49,300 , is powered by a 3.2L , 6 - cylinder engine mated to a manual transmission that returns an EPA estimated 16-mpg in the city and 24-mpg on the highway.