The 2021 BMW X6 is available as a 4-door, 5-seat sport utility. Starting at $67,350, the 2021 BMW X6 xDrive40i AWD is powered by a 3.0L, 6-cylinder engine mated to an automatic transmission that returns an EPA estimated 21-mpg in the city and 25-mpg on the highway. The top of the line 2021 BMW X6 4x2, priced at $65,050, is powered by a 3.0L, 6-cylinder engine mated to an automatic transmission that returns an EPA estimated 21-mpg in the city and 26-mpg on the highway.