Cummins QSK78G12 vs Googol QTAA20V-EG3100
The Cummins QSK78G12 and Googol QTAA20V-EG3100 are both diesel generator engines in a similar power class. Both are rated at roughly 3,438 kVA. Displacement is 78 L versus 107.5 L. The table below compares their full specifications side by side.
| Specification | Cummins QSK78G12 | Googol QTAA20V-EG3100 |
|---|---|---|
| Headline rating | 3,438 kVA | 3,438 kVA |
| Standby (50 Hz) | — | 2,750 kWe |
| Prime (50 Hz) | — | 2,500 kWe |
| Standby (60 Hz) | 2,750 kWe | — |
| Prime (60 Hz) | 2,500 kWe | — |
| Displacement | 78 L | 107.5 L |
| Configuration | V18 | V20 |
| Cylinders | 18 | 20 |
| Rated speed | 1,800 RPM | 1,500 RPM |
| Fuel | Diesel | Diesel |
| Cooling | Liquid-Cooled | Air-Air |
| Emissions | U.S. EPA Tier 2 | China National Stage III / Unregulated |
| Dry weight | — | 7550 kg |
| Origin | United Kingdom | China |
Choosing between Cummins QSK78G12 and Googol QTAA20V-EG3100
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.