It depends which touring cars, because BTCC have actually slowed down a lot since the super tourers of the 90's. Sure in terms of outright power there's only 50-60bhp difference, but a 99 BTCC Ford Mondeo could accelerate deceptively fast, and they could stop on a dime as well. The current cars arn't as good aerodynamically even though they look more aggressive perhaps, they arn't as powerful and they're built to a lower budget. I have a BTCC style Lexus IS200, I'll have to get pictures up some day.