Receiving only minor changes from last year, the 2009 Nissan Altima has added power mirrors and a trip computer, while dual-zone climate control with rear vents and a sunroof are standalone options. Offering a choice of a 2-door coupe or 4-door sedan, the Nissan Altima 2.5 standard features include a 2.5L four-cylinder engine producing 175 hp and 180 lb-ft of torque, but the 3.5 trim packs a 3.5L V6 engine that grinds out 270 hp and 258 lb-ft of torque. Standard is a six-speed manual transmission, with a Continuous Variable Transmission (CVT) as an option. As for fuel economy, the four-cylinder achieves 23 mpg city/31 mpg on the hwy and 26 mpg combined, while the V6 engine scores 19/26/22 mpg with the CVT; however, gas mileage with the manual transmission is virtually the same. Standard safety features on most Nissan Altima trims include antilock disc brakes, front-seat side airbags and full-length side curtain airbags, while traction control is standard on the 3.5 trims only. Stability control is optional on the 3.5 and not offered at all on the 2.5 trim levels.