Cummins QSB5G1 vs VM Motori R754
The Cummins QSB5G1 and VM Motori R754 are both diesel generator engines in a similar power class. Both are rated at roughly 70 kVA. Displacement is 4.5 L versus 3 L. The table below compares their full specifications side by side.
| Specification | Cummins QSB5G1 | VM Motori R754 |
|---|---|---|
| Headline rating | 70 kVA | 70 kVA |
| Standby (50 Hz) | 56 kWe | 56 kWe |
| Prime (50 Hz) | 50 kWe | 50.4 kWe |
| Standby (60 Hz) | 60 kWe | — |
| Prime (60 Hz) | 55 kWe | — |
| Displacement | 4.5 L | 3 L |
| Configuration | L4 | L4 |
| Cylinders | 4 | 4 |
| Rated speed | 1,500 / 1,800 RPM | 1,500 RPM |
| Fuel | Diesel | Diesel |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | U.S. EPA Tier 3 / EU Stage IIIA / China III | Euro Stage V |
| Dry weight | — | — |
| Origin | United States / United Kingdom | Italy |
Choosing between Cummins QSB5G1 and VM Motori R754
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.