For comparison to street cars, Excellence did an article with a shootout of several Porsche Turbos, including a 959 at Sears point. Danny Sullivan was one of the drivers. The lap times all hovered around the 2 min mark.
Also keep in mind that Winston Cup cars are not really designed as road racers. They have a lot of HP, but weigh in at over 3000 lbs, and are limited by the rules to fairly narrow tires (8 inch I think). I am suprised they go as fast as they do.
Tom
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