The 2021 Buick Envision is available as a 4-door, 5-seat sport utility. Starting at $31,800, the 2021 Buick Envision Preferred FWD is powered by a 2.0LL , 4 -cylinder engine mated to an automatic transmission that returns an EPA estimated 24-mpg in the city and 31-mpg on the highway. The top of the line 2021BuickEnvisionAvenir AWD , priced at $ 42,200 , is powered by a 2.0LL , 4 - cylinder engine mated to an automatic transmission that returns an EPA estimated 22-mpg in the city and 29-mpg on the highway.