R. P. M. is a 1970 drama film directed by Stanley Kramer, written by Erich Segal and starring Anthony Quinn and Ann-Margret. As the film's poster notes, the title is an acronym for "revolutions per minute," which at the time was a common term for the variable speed of a record player's turntable.
An unrelated action film, also called RPM, was released in 1997.