If the PP is based on power to wieght ratio it should work ok.
I set online rooms and choose recommened cars that have the same ratio and we have some very close races. For example the Challenger (431 bhp) and the Elise (197 bhp) are a great match. Both bang on 229 bhp per ton.
Another one is the Audi TT (573bhp) versus the Tom's Supra (499 bhp) just 5 bhp /ton difference.
I set online rooms and choose recommened cars that have the same ratio and we have some very close races. For example the Challenger (431 bhp) and the Elise (197 bhp) are a great match. Both bang on 229 bhp per ton.
Another one is the Audi TT (573bhp) versus the Tom's Supra (499 bhp) just 5 bhp /ton difference.