The 2022 BMW Z4 is available as a 2-door, 2-seat convertible. Starting at $49,900, the 2022 BMW Z4 30i is powered by a 2.0LL , 4 -cylinder engine mated to an automatic transmission that returns an EPA estimated 25-mpg in the city and 32-mpg on the highway. The top of the line 2022BMWZ4M40i , priced at $ 63,700 , is powered by a 3.0LL , 6 - cylinder engine mated to an automatic transmission that returns an EPA estimated 22-mpg in the city and 29-mpg on the highway.