Mitsubishi S4S-61SDB vs Weichai WP3.2D28E310
The Mitsubishi S4S-61SDB and Weichai WP3.2D28E310 are both diesel generator engines in a similar power class. Both are rated at roughly 32 kVA. Displacement is 3.331 L versus 3.2 L. The table below compares their full specifications side by side.
| Specification | Mitsubishi S4S-61SDB | Weichai WP3.2D28E310 |
|---|---|---|
| Headline rating | 32 kVA | 31 kVA |
| Standby (50 Hz) | 25.4 kWe | 25 kWe |
| Prime (50 Hz) | 22.9 kWe | 22 kWe |
| Standby (60 Hz) | — | — |
| Prime (60 Hz) | — | — |
| Displacement | 3.331 L | 3.2 L |
| Configuration | L4 | L4 |
| Cylinders | 4 | 4 |
| Rated speed | 1,485 RPM | 1,500 RPM |
| Fuel | Diesel | Diesel |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | Unregulated | China National Stage III / Unregulated |
| Dry weight | 245 kg | — |
| Origin | Japan | China |
Choosing between Mitsubishi S4S-61SDB and Weichai WP3.2D28E310
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 Mitsubishi S4S-61SDB has the higher headline kVA rating in this pair, but site conditions and duty cycle can still change the final recommendation.