Caterpillar 3406 vs Cummins QSM11-G5
The Caterpillar 3406 and Cummins QSM11-G5 are both diesel generator engines in a similar power class. Both are rated at roughly 400 kVA. Displacement is 14.6 L versus 10.8 L. The table below compares their full specifications side by side.
| Specification | Caterpillar 3406 | Cummins QSM11-G5 |
|---|---|---|
| Headline rating | 400 kVA | 400 kVA |
| Standby (50 Hz) | 320 kWe | 320 kWe |
| Prime (50 Hz) | 290 kWe | 290 kWe |
| Standby (60 Hz) | 400 kWe | 320 kWe |
| Prime (60 Hz) | 365 kWe | 290 kWe |
| Displacement | 14.6 L | 10.8 L |
| Configuration | L6 | L6 |
| Cylinders | 6 | 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 | China National Stage III / Unregulated |
| Dry weight | — | — |
| Origin | USA | China |