Volvo Penta TWD1644GE vs Weichai 6M31D640E310
The Volvo Penta TWD1644GE and Weichai 6M31D640E310 are both diesel generator engines in a similar power class. Both are rated at roughly 718 kVA. Displacement is 16.1 L versus 18.6 L. The table below compares their full specifications side by side.
| Specification | Volvo Penta TWD1644GE | Weichai 6M31D640E310 |
|---|---|---|
| Headline rating | 716 kVA | 720 kVA |
| Standby (50 Hz) | 573 kWe | 576 kWe |
| Prime (50 Hz) | 521 kWe | 522 kWe |
| Standby (60 Hz) | 602 kWe | 576 kWe |
| Prime (60 Hz) | 547 kWe | 522 kWe |
| Displacement | 16.1 L | 18.6 L |
| Configuration | L6 | V6 |
| Cylinders | 6 | 6 |
| Rated speed | 1,500 / 1,800 RPM | 1,500 / 1,800 RPM |
| Fuel | Diesel | Diesel |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | Euro Stage II / U.S. EPA Tier 2 | China National Stage III / Unregulated |
| Dry weight | — | — |
| Origin | Sweden | China |
Choosing between Volvo Penta TWD1644GE and Weichai 6M31D640E310
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 Weichai 6M31D640E310 has the higher headline kVA rating in this pair, but site conditions and duty cycle can still change the final recommendation.