..i was there and any comparison taken is invalid and non realistic, considering vehicles exposed on the track..few renaults had entirely removed all seats but driver, tuned up, and tires were track one(im not sure , but all of them had tires for track)..having said this and exposed standard by renault, it is completely natural to say that no motorsport version of BMW has hit track that day..i will not even try to talk about tuned version of any motorsport BMW (few RS were tuned up, even already considered sport)..and if such BMW(motorsport tuned) had hit track, image will be brutally different..in short, it was competition between very very stock everyday BMW's and builted in sports cars and some of them additionally tuned with full race gear...