Originally Posted by shapeshifter309
I've autocrossed against quite a few, and let me tell you, the SCCA doesn't even put these cars in the same class. Numbers only mean half of the equation. The way the car is setup is everything, besides the driver. The NA crossfire, MT or AT, is in D stock. The latest generations of the RX8 are in B stock. If you can count and know your alphabet, I'll let you figure out how many classes higher they are. In an actual course, RX8's give a crossfire a run for it's money.
A bit off topic since I think TS was only curious about the straight-line performance comparison, but I was curious and so looked up the classes. For 2006 at least this is what I found (which shows the classes shapeshifter listed):
SCCA Solo II Car Classifications: Stock by Class