PSI 4.5L vs Yuchai YC4D90N-D30
The PSI 4.5L and Yuchai YC4D90N-D30 are both natural gas generator engines in a similar power class. The Yuchai YC4D90N-D30 is the higher-output unit (63 kVA vs 51 kVA). Displacement is 4.5 L versus 4.214 L. The table below compares their full specifications side by side.
| Specification | PSI 4.5L | Yuchai YC4D90N-D30 |
|---|---|---|
| Headline rating | 51 kVA | 63 kVA |
| Standby (50 Hz) | 41 kWe | — |
| Prime (50 Hz) | 35 kWe | 50 kWe |
| Standby (60 Hz) | 45 kWe | — |
| Prime (60 Hz) | 40 kWe | — |
| Displacement | 4.5 L | 4.214 L |
| Configuration | L4 | L4 |
| Cylinders | 4 | 4 |
| Rated speed | 1,500 / 1,800 RPM | 1,500 RPM |
| Fuel | Natural Gas | Natural Gas |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | U.S. EPA Stationary | Unregulated |
| Dry weight | 500 kg | — |
| Origin | United States | China |