The 2020 Buick Enclave is available as a 4-door, 7-seat sport utility. Starting at $40,000, the 2020 Buick Enclave Preferred FWD is powered by a 3.6L, 6-cylinder engine mated to an automatic transmission that returns an EPA estimated 18-mpg in the city and 26-mpg on the highway. The top of the line 2020 Buick Enclave Avenir AWD, priced at $56,100, is powered by a 3.6L, 6-cylinder engine mated to an automatic transmission that returns an EPA estimated 17-mpg in the city and 25-mpg on the highway.