V20
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A V20 is an internal combustion engine in V configuration, having 20 cylinders.
Engines of this number of cylinders are not common, but this configuration was used in some large diesel engines. For example, the 1960s vintage General Motors Electro-Motive Division EMD SD45 railroad locomotive was fitted with a 20-cylinder EMD 645E3 engine.
The engine name is based on the displacement of each cylinder in cubic inches. In this case 645 inch³ (10.6 L) for each of 20 cylinders - a total of 211 L. Power output is 3,600 horsepower (2.7 MW).
V20 diesel engines have also been used in marine applications: Mercedes-Benz has produced one such engine.
| Piston engine configurations | |
|---|---|
| Straight | Single, 2, 3, 4, 5, 6, 8, 9, 10, 12, 14 |
| V | 2, 4, 5, 6, 8, 10, 12, 16, 20, 24 |
| Flat | 2, 4, 6, 8, 10, 12, 16, H |
| W | 8, 9, 12, 16, 18 |
| Other inline | H, VR, Opposed, U (Square), X |
| Other | Hemi, Radial, Rotary, Pistonless, Deltic, (Wankel) |