The 2019 Mazda Mazda6 is available as a 4-door, 5-seat sedan. Starting at $23,800, the 2019 Mazda Mazda6 Sport is powered by a 2.5L , 4 -cylinder engine mated to an automatic transmission that returns an EPA estimated 26-mpg in the city and 35-mpg on the highway. The top of the line 2019MazdaMazda6Signature , priced at $ 35,100 , is powered by a 2.5L , 4 - cylinder engine mated to an automatic transmission that returns an EPA estimated 23-mpg in the city and 31-mpg on the highway.