Cummins QSB3.9-G35 vs Yuchai YC4A100Z-D20
The Cummins QSB3.9-G35 and Yuchai YC4A100Z-D20 are both diesel generator engines in a similar power class. Both are rated at roughly 80 kVA. Displacement is 3.9 L versus 4.837 L. The table below compares their full specifications side by side.
| Specification | Cummins QSB3.9-G35 | Yuchai YC4A100Z-D20 |
|---|---|---|
| Headline rating | 79 kVA | 80 kVA |
| Standby (50 Hz) | 63 kWe | 64 kWe |
| Prime (50 Hz) | 50 kWe | 60 kWe |
| Standby (60 Hz) | — | — |
| Prime (60 Hz) | — | — |
| Displacement | 3.9 L | 4.837 L |
| Configuration | L4 | L4 |
| Cylinders | 4 | 4 |
| Rated speed | 1,500 RPM | 1,500 RPM |
| Fuel | Diesel | Diesel |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | Unregulated | China National Stage II / Unregulated |
| Dry weight | — | — |
| Origin | China | China |