The 2021 Nissan Maxima is available as a 4-door, 5-seat sedan. Starting at $36,990, the 2021 Nissan Maxima SV is powered by a 3.5L, 6-cylinder engine mated to an automatic transmission that returns an EPA estimated 20-mpg in the city and 30-mpg on the highway. The top of the line 2021 Nissan Maxima Platinum, priced at $42,220, is powered by a 3.5L, 6-cylinder engine mated to an automatic transmission that returns an EPA estimated 20-mpg in the city and 30-mpg on the highway.