Cummins QSM11-G2 vs John Deere 6090CG550
The Cummins QSM11-G2 and John Deere 6090CG550 are both diesel generator engines in a similar power class. Both are rated at roughly 337 kVA. Displacement is 10.8 L versus 9 L. The table below compares their full specifications side by side.
| Specification | Cummins QSM11-G2 | John Deere 6090CG550 |
|---|---|---|
| Headline rating | 338 kVA | 336 kVA |
| Standby (50 Hz) | 270 kWe | 269 kWe |
| Prime (50 Hz) | 240 kWe | 243 kWe |
| Standby (60 Hz) | 300 kWe | 288 kWe |
| Prime (60 Hz) | 270 kWe | 261 kWe |
| Displacement | 10.8 L | 9 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 | China National Stage III / Unregulated | Euro Stage V / U.S. EPA Final Tier 4 |
| Dry weight | — | — |
| Origin | China | United States |
Choosing between Cummins QSM11-G2 and John Deere 6090CG550
Use this comparison as an engineering shortlist, then confirm the complete generator package against load profile, voltage, 50/60 Hz frequency, duty class, emissions rules, cooling margin, altitude, ambient temperature, enclosure design, controller features, and alternator sizing. The Cummins QSM11-G2 has the higher headline kVA rating in this pair, but site conditions and duty cycle can still change the final recommendation.