The 2016 Buick Regal is available as a 4-door, 5-seat sedan. Starting at $28,990, the 2016 Buick Regal Turbo FWD is powered by a 2.0L , 4 -cylinder engine mated to an automatic transmission that returns an EPA estimated 21-mpg in the city and 30-mpg on the highway. The top of the line 2016BuickRegalTurbo Sport Touring FWD , priced at $ 28,565 , is powered by a 2.0L , 4 - cylinder engine that returns an EPA estimated 21-mpg in the city and 30-mpg on the highway.