The 2008 Nissan Sentra is available as a 4-door, 5-seat sedan. Starting at $16,140, the 2008 Nissan Sentra 2.0 (CVT) is powered by a 2.0L , 4 -cylinder engine mated to an automatic transmission that returns an EPA estimated 25-mpg in the city and 33-mpg on the highway. The top of the line 2008NissanSentra2.0S (CVT) , priced at $ 17,170 , is powered by a 2.0L , 4 - cylinder engine mated to an automatic transmission that returns an EPA estimated 25-mpg in the city and 33-mpg on the highway.