The EF-Type was a Turbocharged 90° V6 racing engine developed by Renault Sport, the engine was used by Equipe Renault Elf in Formula One from 1977 to 1985. This engine derived from the CH series designed by François Castaing, the F1 engine was developed by Bernard Dudot.

Renault, a French automobile manufacturer, has been associated with Formula One as both team owner and engine manufacturer for various periods since 1977. In 1977, the company entered Formula One as a constructor, introducing the turbo engine to Formula One with its EF1 engine. In 1983, Renault began supplying engines to other teams. Although the Renault team had won races, it withdrew at the end of 1985. Renault engines continued to be raced until 1986.