Weichai WP4D44E201NG vs Yanmar CP35D1 Gas Engine
The Weichai WP4D44E201NG and Yanmar CP35D1 Gas Engine are both natural gas generator engines in a similar power class. The Yanmar CP35D1 Gas Engine is the higher-output unit (44 kVA vs 38 kVA). Displacement is 4.1 L versus 3.3 L. The table below compares their full specifications side by side.
| Specification | Weichai WP4D44E201NG | Yanmar CP35D1 Gas Engine |
|---|---|---|
| Headline rating | 38 kVA | 44 kVA |
| Standby (50 Hz) | — | — |
| Prime (50 Hz) | 30 kWe | — |
| Standby (60 Hz) | — | — |
| Prime (60 Hz) | — | 35 kWe |
| Displacement | 4.1 L | 3.3 L |
| Configuration | L4 | L4 |
| Cylinders | 4 | 4 |
| Rated speed | 1,500 RPM | 1,800 RPM |
| Fuel | Natural Gas | Natural Gas |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | Unregulated | U.S. EPA Stationary |
| Dry weight | — | — |
| Origin | China | Japan |
Choosing between Weichai WP4D44E201NG and Yanmar CP35D1 Gas Engine
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 Yanmar CP35D1 Gas Engine has the higher headline kVA rating in this pair, but site conditions and duty cycle can still change the final recommendation.