I have video of a CSVT racing an RSX Type S (i was in the CSVT).
There were 3 of us in the car (so 2 people more than the RSX, lets say about 320 lbs).
The RSX had the edge, as it walked us slowly through 2nd and beginning of 3rd). I still say the RSX would win even if you take away the extra 320 lbs, but the drivers can determine the outcome of this race...