VMAN D22B1 vs Weichai 6M31D680E310
The VMAN D22B1 and Weichai 6M31D680E310 are both diesel generator engines in a similar power class. Both are rated at roughly 767 kVA. Displacement is 21.927 L versus 18.6 L. The table below compares their full specifications side by side.
| Specification | VMAN D22B1 | Weichai 6M31D680E310 |
|---|---|---|
| Headline rating | 768 kVA | 765 kVA |
| Standby (50 Hz) | — | 612 kWe |
| Prime (50 Hz) | — | 576 kWe |
| Standby (60 Hz) | 614 kWe | 612 kWe |
| Prime (60 Hz) | 558 kWe | 576 kWe |
| Displacement | 21.927 L | 18.6 L |
| Configuration | V12 | V6 |
| Cylinders | 12 | 6 |
| Rated speed | 1,800 RPM | 1,500 / 1,800 RPM |
| Fuel | Diesel | Diesel |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | Unregulated | China National Stage III / Unregulated |
| Dry weight | — | — |
| Origin | China | China |
Choosing between VMAN D22B1 and Weichai 6M31D680E310
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 D22B1 has the higher headline kVA rating in this pair, but site conditions and duty cycle can still change the final recommendation.