PSI 5.7L T vs Weichai WP4D77E300NG
The PSI 5.7L T and Weichai WP4D77E300NG are both natural gas generator engines in a similar power class. The Weichai WP4D77E300NG is the higher-output unit (86 kVA vs 81 kVA). Displacement is 5.74 L versus 4.5 L. The table below compares their full specifications side by side.
| Specification | PSI 5.7L T | Weichai WP4D77E300NG |
|---|---|---|
| Headline rating | 81 kVA | 86 kVA |
| Standby (50 Hz) | 65 kWe | 69 kWe |
| Prime (50 Hz) | — | 60 kWe |
| Standby (60 Hz) | 80 kWe | 69 kWe |
| Prime (60 Hz) | — | 63 kWe |
| Displacement | 5.74 L | 4.5 L |
| Configuration | V8 | L4 |
| Cylinders | 8 | 4 |
| Rated speed | 1,500 / 1,800 RPM | 1,500 / 1,800 RPM |
| Fuel | Natural Gas | Natural Gas |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | U.S. EPA Stationary | Unregulated |
| Dry weight | 196 kg | — |
| Origin | United States | China |