The 2020 Mazda Mazda3 is available as a 4-door, 5-seat sedan. Starting at $28,900, the 2020 Mazda Mazda3 Premium Package AWD i-ACTIV AWD Hatchback is powered by a 2.5LL , 4 -cylinder engine mated to an automatic transmission that returns an EPA estimated 24-mpg in the city and 32-mpg on the highway. The top of the line 2020MazdaMazda3Premium Package (A6) FWD Hatchback , priced at $ 27,500 , is powered by a 2.5LL , 4 - cylinder engine mated to an automatic transmission that returns an EPA estimated 26-mpg in the city and 35-mpg on the highway.