In an awkward scene, Delaney looks for a place to sit in a nearly empty track commissary, only to ask Lisa if he may join her, claiming that it is the only seat left.

After 13 hours of racing, Erich Stahler spins his Ferrari 512 at Indianapolis Corner, causing teammate Claude Aurac to veer off the track in a major accident.

After he puts her in a waiting car, a journalist asks Delaney whether his and Aurac's accident can be compared to the one with Belgetti in the previous year's race.

After his brush with death, she is even more drawn to him and despairs that he may meet the same fate as her husband; but Delaney finds the thrill too addictive to quit.

In the closing minutes of the race, the two Porsches and their rival Ferraris vie for the win, with Delaney in the #21 car and teammate Larry Wilson in #22.

The race-leading white #25 Porsche 917 "Long tail" was piloted by Vic Elford and Kurt Ahrens Jr.

[6] It traveled 282 laps, or 3,798 kilometres (2,360 miles), and finished the race in 9th position,[7] but it was not classified, as it had not covered the required minimum distance due to the stops to change film reels.

[6] In the crash scenes, comparatively expendable technologically obsolete Lola T70 chassis were fitted with replica Porsche and Ferrari bodywork.

[8] McQueen had wanted to employ Christopher Chapman's new multi-dynamic image technique in the film, as had been done at his instigation with The Thomas Crown Affair, in which he starred in 1968.

"[9] McQueen and John Sturges planned to make a movie called Day of the Champion, which was going to occur at the same time that Grand Prix was in production; lingering troubles with getting production to start meant that McQueen (who rejected an offer to star in Grand Prix) had to focus on other projects, such as The Sand Pebbles (1966).

Unfortunately, Sturges would drop out of the project when Cinema Center did not find the progress of the filming satisfactory (to the point that they wanted to replace McQueen with Robert Redford).

Lee H. Katzin, known for television work, was brought in to finish the project, while McQueen, strapped for resources, had to strike a deal with Cinema Center that saw him lose creative control.

In 2002, it was acquired by comedian Jerry Seinfeld, who asked Joe Cavaglieri to fully restore it to the 1971 film era in Gulf Porsche team livery.