Cummins QSK50-G4 vs Yuchai YC12VC2070-D31
Compare Cummins QSK50-G4 and Yuchai YC12VC2070-D31 by recorded output, operating duty, frequency and engine specifications. Their listed displacements are 50.3 L and 79.17 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 QSK50-G4 | Yuchai YC12VC2070-D31 |
|---|---|---|
| Standby electrical (50 Hz) | 1,360 kWe | 1,350 kWe |
| Prime electrical (50 Hz) | 1,232 kWe | 1,200 kWe |
| Standby electrical (60 Hz) | 1,500 kWe | Not listed |
| Prime electrical (60 Hz) | 1,365 kWe | Not listed |
| Displacement | 50.3 L | 79.17 L |
| Configuration | V16 | V12 |
| Cylinders | 16 | 12 |
| Recorded engine speed | 1,500 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 QSK50-G4: Review the model record and available supporting documents
Yuchai YC12VC2070-D31: Review the model record and available supporting documents
Choosing between Cummins QSK50-G4 and Yuchai YC12VC2070-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.