Caterpillar 3408 vs Cummins QSG12-G4
The Caterpillar 3408 and Cummins QSG12-G4 are both diesel generator engines in a similar power class. Both are rated at roughly 456 kVA. Displacement is 18 L versus 11.8 L. The table below compares their full specifications side by side.
| Specification | Caterpillar 3408 | Cummins QSG12-G4 |
|---|---|---|
| Headline rating | 456 kVA | 455 kVA |
| Standby (50 Hz) | 365 kWe | 364 kWe |
| Prime (50 Hz) | 330 kWe | 333 kWe |
| Standby (60 Hz) | 440 kWe | 418 kWe |
| Prime (60 Hz) | 400 kWe | 383 kWe |
| Displacement | 18 L | 11.8 L |
| Configuration | V8 | L6 |
| Cylinders | 8 | 6 |
| Rated speed | 1,500 / 1,800 RPM | 1,500 / 1,800 RPM |
| Fuel | Diesel | Diesel |
| Cooling | Liquid-Cooled | Liquid-cooled |
| Emissions | U.S. EPA Tier 2 | Unregulated |
| Dry weight | — | 1110 kg |
| Origin | USA | China |