CTS-V. The CTS-V was powered by a supercharged version of the Corvette (C7) 6.2-liter LT4 V8 engine found on the Z06. It generated 640 horsepower (480 kW), 10 horsepower (7.5 kW) less than the Z06, making the third-generation CTS-V the most powerful Cadillac ever produced to date, and 630 pound-feet (850 N⋅m).