Cummins QSB5G11 vs Perkins 1104C-44TAG2
The Cummins QSB5G11 and Perkins 1104C-44TAG2 are both diesel generator engines in a similar power class. Both are rated at roughly 114 kVA. Displacement is 4.5 L versus 4.4 L. The table below compares their full specifications side by side.
| Specification | Cummins QSB5G11 | Perkins 1104C-44TAG2 |
|---|---|---|
| Headline rating | 114 kVA | 113 kVA |
| Standby (50 Hz) | 91 kWe | 90 kWe |
| Prime (50 Hz) | 82 kWe | 81 kWe |
| Standby (60 Hz) | 101 kWe | 101 kWe |
| Prime (60 Hz) | 92 kWe | 92 kWe |
| Displacement | 4.5 L | 4.4 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 | Unregulated |
| Dry weight | — | — |
| Origin | United States / United Kingdom | China |
Choosing between Cummins QSB5G11 and Perkins 1104C-44TAG2
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 QSB5G11 has the higher headline kVA rating in this pair, but site conditions and duty cycle can still change the final recommendation.