What would you say is the worst performing premium car in the sports class?
I would have to say the Rapid GT. The car does have a high top speed, but it takes a while to get there. The car understeers massively, and you often find yourself slowing down a lot for corners -- more than if you were driving any other sports car.
I did have a Rapid GT, but it was mostly used for fun. It wasn't really a serious racer.