The 2020 BMW X4 is available as a 4-door, 5-seat sport utility. Starting at $51,100, the 2020 BMW X4 xDrive30i is powered by a 2.0L , 4 -cylinder engine mated to an automatic transmission that returns an EPA estimated 23-mpg in the city and 28-mpg on the highway. The top of the line 2020BMWX4M40i , priced at $ 61,000 , 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 27-mpg on the highway.