As Kal has since been kind enough to explain it seems the chaps over at Fiorano have thrown a fly in the ointment and the rules have changed since I was last paying attention *facepalm*
Shame really, I was intriguied to see how they'd perform although I think rally cars and some of the vehicles favoured by the Japanese tuning industry still go a long way to proving a turbo'd four pot can slay giants with the best of them!