Cummins QSK38-G6 vs VMAN D30A2
The Cummins QSK38-G6 and VMAN D30A2 are both diesel generator engines in a similar power class. Both are rated at roughly 989 kVA. Displacement is 37.7 L versus 29.235 L. The table below compares their full specifications side by side.
| Specification | Cummins QSK38-G6 | VMAN D30A2 |
|---|---|---|
| Headline rating | 988 kVA | 990 kVA |
| Standby (50 Hz) | 790 kWe | 792 kWe |
| Prime (50 Hz) | 712 kWe | 716 kWe |
| Standby (60 Hz) | — | — |
| Prime (60 Hz) | — | — |
| Displacement | 37.7 L | 29.235 L |
| Configuration | V12 | V16 |
| Cylinders | 12 | 16 |
| Rated speed | 1,500 RPM | 1,500 RPM |
| Fuel | Diesel | Diesel |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | U.S. EPA Tier 2 | Unregulated |
| Dry weight | — | — |
| Origin | United States | China |
Choosing between Cummins QSK38-G6 and VMAN D30A2
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 D30A2 has the higher headline kVA rating in this pair, but site conditions and duty cycle can still change the final recommendation.