The 2009 Nissan Altima is available as a 4-door, 5-seat sedan. Starting at $19,900, the 2009 Nissan Altima 2.5 (CVT) Sedan 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. The top of the line 2009 Nissan Altima 3.5 SE (CVT) Coupe, priced at $26,890, is powered by a 3.5L, 6-cylinder engine mated to an automatic transmission that returns an EPA estimated 19-mpg in the city and 26-mpg on the highway.