The one with Steve McQueen in was Le Mans. Grand Prix was a different one.
If you've ever read the book by Christopher Hilton 'As time goes by' on Senna, then there's a section on the film in there - Hilton was asked to help - and I believe he has some sort of rights to it, as if the film was made then the story would be based on his earlier books on Senna. There is a short extract in teh book of the film script - unfortunately I don't have the book to hand, but if anyone else has, it may be of interest...
