Cummins QSB5G1 vs Sida Power 4BMZ1
The Cummins QSB5G1 and Sida Power 4BMZ1 are both diesel generator engines in a similar power class. Both are rated at roughly 70 kVA. Displacement is 4.5 L versus 3.8 L. The table below compares their full specifications side by side.
| Specification | Cummins QSB5G1 | Sida Power 4BMZ1 |
|---|---|---|
| Headline rating | 70 kVA | 70 kVA |
| Standby (50 Hz) | 56 kWe | 56 kWe |
| Prime (50 Hz) | 50 kWe | 52 kWe |
| Standby (60 Hz) | 60 kWe | 64 kWe |
| Prime (60 Hz) | 55 kWe | 60 kWe |
| Displacement | 4.5 L | 3.8 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 Tier 3 / EU Stage IIIA / China III | Application-dependent |
| Dry weight | — | 390 kg |
| Origin | United States / United Kingdom | China |
Choosing between Cummins QSB5G1 and Sida Power 4BMZ1
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.