The 2012 Nissan Sentra is available as a 4-door, 5-seat sedan. Starting at $16,430, the 2012 Nissan Sentra 2.0 (M6) is powered by a 2.0L, 4-cylinder engine mated to a manual transmission that returns an EPA estimated 24-mpg in the city and 31-mpg on the highway. The top of the line 2012 Nissan Sentra SE-R Spec V (M6), priced at $20,990, is powered by a 2.5L, 4-cylinder engine mated to a manual transmission that returns an EPA estimated 21-mpg in the city and 28-mpg on the highway.