The 2012 BMW ALPINA B7 is available as a 4-door, 5-seat sedan. Starting at $122,600, the 2012 BMW ALPINA B7 RWD Sedan 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 22-mpg on the highway. The top of the line 2012 BMW ALPINA B7 AWD Long Wheelbase Sedan, priced at $129,500, 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.