2012 Nissan Sentra SE-R Overview & Specs The heart and soul of the Sentra SE-R and SE-R Spec V are their advanced high-output QR25DE 2.5-liter DOHC 4-cylinder engines. Along with the larger displacement versus the standard Sentra’s 2.0-liter powerplant, the engine features extensive modification – helping achieve 177 horsepower at 6,000 rpm and 172 lb-ft of torque at 2,800 rpm in the SE-R and 200 horsepower at 6,600 rpm and 180 lb-ft of torque at 5,200 rpm in the SE-R Spec V. Among the SE-R Spec V’s engine features are the use of a unique resin intake manifold and dual branch exhaust manifold; revised piston crown shape to support its 10.5:1 compression; iridium tipped spark plugs for improved combustion characteristics; and a revised cam shaft profile, reinforced connecting rods and 8-counterweight crankshaft to achieve a higher redline limit of 7,000 rpm (versus 6,200 rpm in the SE-R). The Sentra SE-R is equipped with Nissan’s Xtronic CVT® (Continuously Variable Transmission) with steering wheel-mounted paddle shifters, providing a unique offering in the sport compact market, while the SE-R Spec V is available exclusively with a close-ratio 6-speed manual transmission. Vehicle Dynamic Control (VDC) and Traction Control System (TCS) are standard, and an optional Helical Limited-Slip Differential is available with SE-R Spec V only. Both vehicles utilize an independent strut, coil spring front and torsion beam rear suspension design with front and rear stabilizer bars, along with 4-wheel disc brakes, Anti-lock Braking System (ABS) and Electronic Brake force Distribution (EBD), power-assisted electric steering and 17-inch aluminum-alloy wheels. The SE-R utilizes 11.7-inch front and 11.5-inch rear rotors, while contact with the road is handled through 225/45VR17 all-season performance tires. The SE-R Spec V has even larger 12.6-inch front rotors and P225/45WR17 summer performance tires. The SE-R Spec V also features unique suspension tuning and body structure changes versus the base SE-R. The SE-R Spec V is equipped with higher rate springs, shocks and bushings and a larger (25mm) front stabilizer bar. A revised cowl top structure and a unique trunk mounted “V” brace are utilized for increased body rigidity.