Originally Posted by ILC32
I don't think you can reasonably compare the CTS-V race car with the M3 race cars, which were really production based. The M3 used a regular street-derived chassis. If you have ever seen the inside of one of the PTG cars, you will see the stock dashboard shell, steel unit body tub, etc. The CTS-V, like the current "Pontiac" GTOs was a true tube-framed, purpose-built, racer with a silhouette body shell.
Even Porsche is finding it a challenge to compete with the tube frame cars. They really do not belong in the same class with cars based on production vehicles.
I have since found a Nordschliefe time of 8:19 for the current CTS-V, which is faster than the time for the e46 M3.
So, yes, bottom line, I believe the next gen CTS-V is fully capable of running with and probably humiliating the next gen M3 on a track due to its huge HP advantage.