The 2022 BMW ALPINA B8 Gran Coupe is available as a 4-door, 5-seat sedan. Starting at $139,900, the 2022 BMW ALPINA B8 Gran Coupe xDrive is powered by a 4.4LL , 8 - cylinder engine mated to an automatic transmission that returns an EPA estimated 17-mpg in the city and 24-mpg on the highway.