Cummins QSB5G11 vs Sida Power 4FWZL1
The Cummins QSB5G11 and Sida Power 4FWZL1 are both diesel generator engines in a similar power class. Both are rated at roughly 115 kVA. Displacement is 4.5 L versus 3.6 L. The table below compares their full specifications side by side.
| Specification | Cummins QSB5G11 | Sida Power 4FWZL1 |
|---|---|---|
| Headline rating | 114 kVA | 115 kVA |
| Standby (50 Hz) | 91 kWe | 92 kWe |
| Prime (50 Hz) | 82 kWe | 90 kWe |
| Standby (60 Hz) | 101 kWe | 100 kWe |
| Prime (60 Hz) | 92 kWe | 96 kWe |
| Displacement | 4.5 L | 3.6 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 | Application-dependent |
| Dry weight | — | 370 kg |
| Origin | United States / United Kingdom | China |
Choosing between Cummins QSB5G11 and Sida Power 4FWZL1
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 Sida Power 4FWZL1 has the higher headline kVA rating in this pair, but site conditions and duty cycle can still change the final recommendation.