Cummins QSK23G6 vs VMAN D22.1
The Cummins QSK23G6 and VMAN D22.1 are both diesel generator engines in a similar power class. Both are rated at roughly 937 kVA. Displacement is 23 L versus 21.927 L. The table below compares their full specifications side by side.
| Specification | Cummins QSK23G6 | VMAN D22.1 |
|---|---|---|
| Headline rating | 938 kVA | 936 kVA |
| Standby (50 Hz) | — | — |
| Prime (50 Hz) | — | — |
| Standby (60 Hz) | 750 kWe | 749 kWe |
| Prime (60 Hz) | 682 kWe | 680 kWe |
| Displacement | 23 L | 21.927 L |
| Configuration | L6 | V12 |
| Cylinders | 6 | 12 |
| Rated speed | 1,800 RPM | 1,800 RPM |
| Fuel | Diesel | Diesel |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | U.S. EPA Tier 2 | Unregulated |
| Dry weight | — | — |
| Origin | India | China |
Choosing between Cummins QSK23G6 and VMAN D22.1
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 Cummins QSK23G6 has the higher headline kVA rating in this pair, but site conditions and duty cycle can still change the final recommendation.