Cummins QSK78G19 vs MTU MTU 20V4000 G24S
The Cummins QSK78G19 and MTU MTU 20V4000 G24S are both diesel generator engines in a similar power class. Both are rated at roughly 3,415 kVA. Displacement is 78 L versus 95.4 L. The table below compares their full specifications side by side.
| Specification | Cummins QSK78G19 | MTU MTU 20V4000 G24S |
|---|---|---|
| Headline rating | 3,438 kVA | 3,391 kVA |
| Standby (50 Hz) | — | — |
| Prime (50 Hz) | — | — |
| Standby (60 Hz) | 2,750 kWe | 2,713 kWe |
| Prime (60 Hz) | 2,500 kWe | 2,466 kWe |
| Displacement | 78 L | 95.4 L |
| Configuration | V18 | V20 |
| Cylinders | 18 | 20 |
| Rated speed | 1,800 RPM | 1,800 RPM |
| Fuel | Diesel | Diesel |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | Unregulated | Unregulated |
| Dry weight | — | — |
| Origin | United Kingdom | Germany |
Choosing between Cummins QSK78G19 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. The Cummins QSK78G19 has the higher headline kVA rating in this pair, but site conditions and duty cycle can still change the final recommendation.