Cummins 4BTA3.9-G11 vs Yunnei DEF47CFA3
The Cummins 4BTA3.9-G11 and Yunnei DEF47CFA3 are both diesel generator engines in a similar power class. Both are rated at roughly 101 kVA. Displacement is 3.9 L versus 4.7 L. The table below compares their full specifications side by side.
| Specification | Cummins 4BTA3.9-G11 | Yunnei DEF47CFA3 |
|---|---|---|
| Headline rating | 100 kVA | 101 kVA |
| Standby (50 Hz) | 80 kWe | — |
| Prime (50 Hz) | 64 kWe | 81 kWe |
| Standby (60 Hz) | 90 kWe | — |
| Prime (60 Hz) | 72 kWe | — |
| Displacement | 3.9 L | 4.7 L |
| Configuration | L4 | L4 |
| Cylinders | 4 | 4 |
| Rated speed | 1,500 / 1,800 RPM | 1,500 RPM |
| Fuel | Diesel | Diesel |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | Unregulated | Euro Stage IIIA |
| Dry weight | — | — |
| Origin | China | China |
Choosing between Cummins 4BTA3.9-G11 and Yunnei DEF47CFA3
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 Yunnei DEF47CFA3 has the higher headline kVA rating in this pair, but site conditions and duty cycle can still change the final recommendation.