Factual error: In the Brighton street scenes the parading air cadets are wearing service issue pullovers. These were not introduced as part of the uniform until the mid seventies. During the sixties air cadets would have been wearing battledress tunics.
Continuity mistake: During the scene where Spider returns to the club and the Mods are off hunting, John Altman is seen leaving the club and riding on the back of a scooter. Second shot, he's dancing.
Revealing mistake: The police in the riot scenes have got hair hanging well over their collars - they are supposed to be POLICE in the mid 1960s whereas in fact they are a mob of scruffy layabout 1970s extras.
Factual error: Routemaster buses have the late 1970s white London Transport logo, not the gold lettering they should have for the mid 1960s when the film is set.
Factual error: The police vans used in the riot scene are Austin-Morris J4 models, with B registrations, dating them to 1964. The Austin-Morris badge on the front of these vans was only fitted to vans made between 1971-1975. If it is a 1964 van the badge on the front should read Morris Commercial.
Factual error: The bikes are all wrong. Rockers at that time went in for the 'Cafe Racer' style with clip-on handle bars, rear set footrests, bum stops etc. The bikes in the shots en route to Brighton had high bars; five years too early.
Factual error: This error occurs throughout the film, but is most noticeable in the sequence where the mods have arrived at Brighton, and Jimmy & Steph are walking along with the scooters parked behind them. One can see Lambretta models that are yet to be produced. There is an abundance of SX and GP models. SX's were not produced until 1966 and GP's were not seen until 1969. Look carefully and one can see an Indian produced GP that didn't reach the UK until 1970.
Factual error: During the party scene, as Jimmy changes the record that's playing to My Generation, a copy of The Who Sell Out can be seen in the background. This LP wasn't released until 2 years after Quadrophenia was set, in 1967. The actual version shown is an early 1970s re-issue, so it's actually around 10 years too early.
Factual error: In the scene where jimmy visits Pete at his breakers' yard, the grafitto 'NF' can be seen scrawled on the corrugated fence. NF stands for 'National Front', a far right political party with racist agenda that wasn't formed until 1967.
Continuity mistake: In the party scene, the Who's Quick One/Sell out album is in a different position the second time it's shown.
Factual error: Too many post 1964 cars in this film to list.