The 2020 Buick Regal Sportback is available as a 4-door, 5-seat hatchback. Starting at $25,370, the 2020 Buick Regal Sportback Base FWD is powered by a 2.0L, 4-cylinder engine mated to an automatic transmission that returns an EPA estimated 22-mpg in the city and 32-mpg on the highway. The top of the line 2020 Buick Regal Sportback GS AWD, priced at $39,070, is powered by a 3.6L, 6-cylinder engine mated to an automatic transmission that returns an EPA estimated 19-mpg in the city and 27-mpg on the highway.