’09 Corvette has 638 horses, reaches 205 mph

The 2009 Chevrolet Corvette ZR1's supercharged V-8 officially produces 638-horsepower, General Motors Corp. executives announced today. GM completed SAE certification of the ZR1's 6.2-liter LS9 engine and released the results at midnight.

The final tally: 638 horses and 604-pound-feet torque and blistering top speed of 205 mph.

The ZR1 will be built at the Bowling Green Assembly Plant in Kentucky, home to the regular Corvette and Z06.

The LS9 engine will be hand built at GM's Performance Build Center in Wixom.

With a 0-60 time besting the Corvette Z06's 3.7 seconds, the ZR1 enters supercar territory with its power and quickness.

Final numbers have not been released. See related article