Cummins QSX15G9 vs Yuchai YC6TD780-D31
Compare Cummins QSX15G9 and Yuchai YC6TD780-D31 by recorded output, operating duty, frequency and engine specifications. Their listed displacements are 15 L and 19.598 L, respectively. Start with the same duty and frequency, then check each model’s source and package conditions. These records alone do not establish interchangeability.
| Specification | Cummins QSX15G9 | Yuchai YC6TD780-D31 |
|---|---|---|
| Standby electrical (50 Hz) | Not listed | 500 kWe |
| Prime electrical (50 Hz) | Not listed | 450 kWe |
| Standby electrical (60 Hz) | 500 kWe | Not listed |
| Prime electrical (60 Hz) | 450 kWe | Not listed |
| Other recorded mechanical power (duty unspecified) | 563 kW | Not listed |
| Displacement | 15 L | 19.598 L |
| Configuration | L6 | L6 |
| Cylinders | 6 | 6 |
| Recorded engine speed | 1,800 RPM | 1,500 RPM |
| Fuel | Diesel | Diesel |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Recorded emissions classification | U.S. EPA Tier 2 | China National Stage III / Unregulated |
| Dry weight | Not listed | Not listed |
| Origin | United States | China |
Compare matching ratings
Read across a row to compare the same operating duty and frequency. kWe is electrical output; mechanical kW is power at the engine shaft. kVA is apparent electrical power and is shown only when kWe is missing, without converting it. “Not listed” means the record lacks that rating, not zero output. Continuous and prime duties are kept separate. Check source documents, units and site conditions before comparing values.
An emissions classification in the catalog is not proof of certification for your engine or installation. Confirm the exact model, applicable documents and generator configuration.
Cummins QSX15G9: Review the model record and available supporting documents
Yuchai YC6TD780-D31: Review the model record and available supporting documents
Choosing between Cummins QSX15G9 and Yuchai YC6TD780-D31
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.