A1 Driving Test, TDU2?

I've been playing the game a while but I just can't seem to p the tests for my a1 cl licence. I have an Ariel atom and Bugatti veyron myself, but the cars used for the tests seem completely useless. If I'm going fast enough to finish the course I'm barely able to keep the from flying off the track, resulting in a mive penalty and that challenge being ruined. Anyone have any tips for using the zonda and whichever the other car is to p these?