Just race him and find out.. why waste time asking for opinions based on no facts from people over the internet? You'll lose to the crx, bigtime. No advice offered as to the RX-7 because you've provided us no information that's useful. "I think it's older, and not turbo" means nothing to me. It could have nos, a different engine, a supercharger, who the hell knows. Just race him and find out. .