Audi S1 Quattro Rally Car with Stig Blomqvist at Race of Champions

RadioLeMans.com's John Hindhaugh on the Audi S1 Quattro Group B rally car -- as World Rally champ Stig Blomqvist takes it around the ROC track. The S1's a fixture at ROC via its Group B connection to Race of Champions organizer and rally legend Michèle Mouton.