• Clarisse survives throughout the film and accompanies Montag when he leaves the city.
• The role played by Faber is reduced significantly, appearing only briefly in one scene as an old man who is searched for books in a park as the cinematography surrounds him with black borders.
• The obsession with fast and often fatal driving that permeates the novel is nowhere in the film. Only three automobiles are seen in the film; a Jaguar S-Type, a Commer Imp van, and art director Syd Cain's red Excalibur roadster.
• Bradbury has said that Truffaut "captured the soul and essence of the book," although he disliked the double omission of Faber and the Mechanical Hound.
• Once Montag begins reading, the machines of his society (represented by the Mechanical Hound in the book) turn against him. In the film this is represented by his being unable to go up the fireman's pole and the door of his home no longer opening automatically.
• The nuclear war in the book is absent, though one of Linda's friends talks about her husband being called up by the military.
• The film adds a pursuit of Montag with James Bond type jet packs and an attack from a machine gun firing helicopter that's televised.

Production