For 2012, Nissan's Altima Sedan is again available in three models, the 2.5 CVT and 2.5 S CVT featuring a 175-horsepower 2.5L inline four-cylinder, and the 3.5 SR CVT with a standard 270-horsepower 3.5L V-6 engine. The 2012 model-year marked the final year of the fourth-generation Altima that debuted with the 2007-MY.