Cummins QSG12-G3 vs VMAN D15A2
The Cummins QSG12-G3 and VMAN D15A2 are both diesel generator engines in a similar power class. Both are rated at roughly 409 kVA. Displacement is 11.8 L versus 14.618 L. The table below compares their full specifications side by side.
| Specification | Cummins QSG12-G3 | VMAN D15A2 |
|---|---|---|
| Headline rating | 409 kVA | 409 kVA |
| Standby (50 Hz) | 327 kWe | 327 kWe |
| Prime (50 Hz) | 296 kWe | 297 kWe |
| Standby (60 Hz) | 370 kWe | — |
| Prime (60 Hz) | 340 kWe | — |
| Displacement | 11.8 L | 14.618 L |
| Configuration | L6 | V8 |
| Cylinders | 6 | 8 |
| Rated speed | 1,500 / 1,800 RPM | 1,500 RPM |
| Fuel | Diesel | Diesel |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | Unregulated | Unregulated |
| Dry weight | 1110 kg | — |
| Origin | China | China |
Choosing between Cummins QSG12-G3 and VMAN D15A2
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.