Mitsubishi S6R-PTA vs VMAN D22A
The Mitsubishi S6R-PTA and VMAN D22A are both diesel generator engines in a similar power class. Both are rated at roughly 679 kVA. Displacement is 24.51 L versus 21.927 L. The table below compares their full specifications side by side.
| Specification | Mitsubishi S6R-PTA | VMAN D22A |
|---|---|---|
| Headline rating | 677 kVA | 681 kVA |
| Standby (50 Hz) | 541.6 kWe | 545 kWe |
| Prime (50 Hz) | 489.6 kWe | 500 kWe |
| Standby (60 Hz) | 622.4 kWe | — |
| Prime (60 Hz) | 565.6 kWe | — |
| Displacement | 24.51 L | 21.927 L |
| Configuration | L6 | V12 |
| Cylinders | 6 | 12 |
| Rated speed | 1,500 / 1,800 RPM | 1,500 RPM |
| Fuel | Diesel | Diesel |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | Unregulated | Unregulated |
| Dry weight | 2800 kg | — |
| Origin | Japan | China |
Choosing between Mitsubishi S6R-PTA and VMAN D22A
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 D22A has the higher headline kVA rating in this pair, but site conditions and duty cycle can still change the final recommendation.