The 2020 BMW X4 M is available as a 4-door, 5-seat sport utility. Starting at $73,400, the 2020 BMW X4 M Base is powered by a 3.0L , 6 -cylinder engine mated to an automatic transmission that returns an EPA estimated 14-mpg in the city and 19-mpg on the highway. The top of the line 2020BMWX4 MCompetition , priced at $ 80,400 , is powered by a 3.0L , 6 - cylinder engine mated to an automatic transmission that returns an EPA estimated 14-mpg in the city and 19-mpg on the highway.