6.2L Supercharged V8 engine

No engine for the fainthearted, this 6.2L supercharged V8 with 556-hp and 551 lb-ft of torque propels the CTS-V Sedan to 60 mph in less than 4 seconds.  At the heart of this power is a twin-rotor supercharger – each rotor featuring an extra lobe and twisted 100 degrees farther than normal for smoother, more efficient airflow, less noise, and less vibration.