2015 Chevrolet Corvette Z06 has been rated at 650 horsepower, which means that it is the most powerful production car that General Motors have ever produced. It is powered by the Supercharged LT4 V-8 engine that has been SAE-certified at 650 horsepower (485 kW) at 6,400 rpm and 650 lb-ft of torque (881 Nm) at 3,600 rpm. In fact, the new Z06 engine delivers 40 percent more peak torque (180 lb-ft / 244 Nm) than the previous-generation’s 7.0L LS7; as well as 7.5 percent more than the supercharged 2013 Corvette ZR1′s 604 lb-ft (819 Nm).
At 3,200 rpm, the new LT4 surpasses the LS7 by 208 lb-ft of torque (252 Nm). On the horsepower side of the graph, the LT4′s 650-hp rating is 29 percent greater than the LS7′s 505 horsepower (376 kW), and 12 horses more than the ZR1′s LS9 engine.