| Diesel | |
| Director: | Gerhard Lamprecht |
| Producer: | Richard H. Riedel |
| Cinematography: | Georg Krause |
| Editing: | Wolfgang Wehrum |
| Music: | Hans-Otto Borgmann |
| Studio: | UFA |
| Distributor: | UFA |
| Runtime: | 109 minutes |
| Country: | Nazi Germany |
| Language: | German |
Diesel is a 1942 German biographical film directed by Gerhard Lamprecht and starring Willy Birgel, Hilde Weissner, and Paul Wegener. It portrays the life of Rudolf Diesel, the German inventor of the diesel engine. It was one of a series of prestigious biopics made in Nazi Germany portraying genius inventors or artists struggling against the societies in which they live. The film was based on a biography by Eugen Diesel, one of Diesel's children.
It was shot at the Babelsberg Studios in Berlin. The film's sets were designed by art director Erich Kettelhut. Made on a large budget of, the film was a popular box office success and recouped its production costs.