Renault EF-Type engine
| EF-Type engine | |
|---|---|
 Renault EF4 | |
| Overview | |
| Manufacturer |  Renault Sport |
| Designer | Bernard Dudot François Castaing (base design) |
| Production | 1977–1986 |
| Layout | |
| Configuration | 90° V-6 |
| Displacement | 1.5 L (1,492 cc) 1.5 L (1,494 cc) |
| Cylinder bore | 86 mm (3.39 in) 80.1 mm (3.15 in) |
| Piston stroke | 42.8 mm (1.69 in) 49.4 mm (1.94 in) |
| Compression ratio | 7.0:1-7.5:1 |
| Combustion | |
| Turbocharger | Garrett or KKK |
| Fuel system | Electronic fuel injection |
| Fuel type | Gasoline |
| Cooling system | Water-cooled |
| Output | |
| Power output | 510–1,320 bhp (380–984 kW; 517–1,338 PS) |
| Torque output | 290–660 lb⋅ft (393–895 N⋅m) |
| Dimensions | |
| Dry weight | 179 kg (394.6 lb) |
| Chronology | |
| Predecessor | CH |
| Successor | RS |
The EF-Type was a Turbocharged 90° V6 racing engine developed by Renault Sport. The engine was used by Renault, Lotus, Ligier and Tyrrell in Formula One from 1977 to 1986. It was developed by Bernard Dudot from the earlier, 2-litre CH-series V6 engine, designed by François Castaing.