One of my Christmas presents last year was a copy of Michael Keyser's book "A French Kiss With Death" about the making of this movie (I had to drop a BIG hint!). Having just finished the book I watched the movie again with a much greater understanding of how it came to be made and the problems which plagued its production.
It is probably extremely rare for a major feature film to have absolutely no script - not even an outline - and no female lead after two months of shooting, but that was indicative of the sort of movie McQueen was determined to make. The race IS the story, and the story of the race is very well told. McQueen's racing experience, his need to have credibility within the racing world and the large number of real racing drivers and real racing cars involved all add up to an authenticity which exceeded that of Frankenheimer's "Grand Prix" and which is still unequalled. A couple of minor errors in the cars' paint jobs fail to dampen the reality of the on-track action.
It is true that the off-track storyline is a little weak, and some of the performances are a bit hammy, but McQueen absolutely nailed the "feel" of the Le Mans race. For this reason it is many race fans' favourite movie. It's certainly mine .