Cummins QSB5G11 vs Volvo Penta TAD551GE
The Cummins QSB5G11 and Volvo Penta TAD551GE are both diesel generator engines in a similar power class. Both are rated at roughly 114 kVA. Displacement is 4.5 L versus 5.1 L. The table below compares their full specifications side by side.
| Specification | Cummins QSB5G11 | Volvo Penta TAD551GE |
|---|---|---|
| Headline rating | 114 kVA | 114 kVA |
| Standby (50 Hz) | 91 kWe | 91 kWe |
| Prime (50 Hz) | 82 kWe | 81 kWe |
| Standby (60 Hz) | 101 kWe | 101 kWe |
| Prime (60 Hz) | 92 kWe | 90 kWe |
| Displacement | 4.5 L | 5.1 L |
| Configuration | L4 | L4 |
| Cylinders | 4 | 4 |
| Rated speed | 1,500 / 1,800 RPM | 1,500 / 1,800 RPM |
| Fuel | Diesel | Diesel |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | U.S. EPA Final Tier 4 / EU Stage IIIA | EU Stage IIIA / EPA Tier 3 |
| Dry weight | — | — |
| Origin | United States / United Kingdom | Sweden |
Choosing between Cummins QSB5G11 and Volvo Penta TAD551GE
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.