Cummins QSG12-G4 vs VMAN D15B2
The Cummins QSG12-G4 and VMAN D15B2 are both diesel generator engines in a similar power class. Both are rated at roughly 456 kVA. Displacement is 11.8 L versus 14.618 L. The table below compares their full specifications side by side.
| Specification | Cummins QSG12-G4 | VMAN D15B2 |
|---|---|---|
| Headline rating | 455 kVA | 456 kVA |
| Standby (50 Hz) | 364 kWe | — |
| Prime (50 Hz) | 333 kWe | — |
| Standby (60 Hz) | 418 kWe | 365 kWe |
| Prime (60 Hz) | 383 kWe | 333 kWe |
| Displacement | 11.8 L | 14.618 L |
| Configuration | L6 | V8 |
| Cylinders | 6 | 8 |
| Rated speed | 1,500 / 1,800 RPM | 1,800 RPM |
| Fuel | Diesel | Diesel |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | Unregulated | Unregulated |
| Dry weight | 1110 kg | — |
| Origin | China | China |
Choosing between Cummins QSG12-G4 and VMAN D15B2
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 VMAN D15B2 has the higher headline kVA rating in this pair, but site conditions and duty cycle can still change the final recommendation.