Cummins VTA28G7 vs VMAN D22.1
The Cummins VTA28G7 and VMAN D22.1 are both diesel generator engines in a similar power class. Both are rated at roughly 940 kVA. Displacement is 28 L versus 21.927 L. The table below compares their full specifications side by side.
| Specification | Cummins VTA28G7 | VMAN D22.1 |
|---|---|---|
| Headline rating | 944 kVA | 936 kVA |
| Standby (50 Hz) | — | — |
| Prime (50 Hz) | — | — |
| Standby (60 Hz) | 755 kWe | 749 kWe |
| Prime (60 Hz) | — | 680 kWe |
| Displacement | 28 L | 21.927 L |
| Configuration | V12 | V12 |
| Cylinders | 12 | 12 |
| Rated speed | 1,800 RPM | 1,800 RPM |
| Fuel | Diesel | Diesel |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | Unregulated | Unregulated |
| Dry weight | — | — |
| Origin | India | China |
Choosing between Cummins VTA28G7 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 VTA28G7 has the higher headline kVA rating in this pair, but site conditions and duty cycle can still change the final recommendation.