Cummins QSK78-G14 vs MTU MTU 20V4000 G24S
Compare Cummins QSK78-G14 and MTU MTU 20V4000 G24S by recorded output, operating duty, frequency and engine specifications. Their listed displacements are 77.6 L and 95.4 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 QSK78-G14 | MTU MTU 20V4000 G24S |
|---|---|---|
| Standby electrical (50 Hz) | Not listed | Not listed |
| Prime electrical (50 Hz) | Not listed | Not listed |
| Standby electrical (60 Hz) | 2,750 kWe | 2,713 kWe |
| Prime electrical (60 Hz) | 2,500 kWe | 2,466 kWe |
| Displacement | 77.6 L | 95.4 L |
| Configuration | V18 | V20 |
| Cylinders | 18 | 20 |
| Recorded engine speed | 1,800 RPM | 1,500 RPM |
| Fuel | Diesel | Diesel |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Recorded emissions classification | U.S. EPA Final Tier 4 | Unregulated |
| Dry weight | Not listed | Not listed |
| Origin | Not listed | Germany |
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 QSK78-G14: Review the model record and available supporting documents
MTU MTU 20V4000 G24S: Review the model record and available supporting documents
Choosing between Cummins QSK78-G14 and MTU MTU 20V4000 G24S
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.