The 2020 Nissan Altima is available as a 4-door, 5-seat sedan. Starting at $24,300, the 2020 Nissan Altima 2.5 S FWD is powered by a 2.5LL , 4 -cylinder engine mated to an automatic transmission that returns an EPA estimated 28-mpg in the city and 39-mpg on the highway. The top of the line 2020NissanAltimaPlatinum AWD , priced at $ 33,750 , is powered by a 2.5LL , 4 - cylinder engine mated to an automatic transmission that returns an EPA estimated 25-mpg in the city and 35-mpg on the highway.