Cummins 4BT3.9-G2 vs Xinchai 4N28ZD
The Cummins 4BT3.9-G2 and Xinchai 4N28ZD are both diesel generator engines in a similar power class. Both are rated at roughly 50 kVA. Displacement is 3.9 L versus 2.8 L. The table below compares their full specifications side by side.
| Specification | Cummins 4BT3.9-G2 | Xinchai 4N28ZD |
|---|---|---|
| Headline rating | 50 kVA | 50 kVA |
| Standby (50 Hz) | 40 kWe | 40 kWe |
| Prime (50 Hz) | 32 kWe | 35 kWe |
| Standby (60 Hz) | 45 kWe | 41 kWe |
| Prime (60 Hz) | 36 kWe | 38 kWe |
| Displacement | 3.9 L | 2.8 L |
| Configuration | L4 | L4 |
| Cylinders | 4 | 4 |
| Rated speed | 1,500 / 1,800 RPM | 1,500 / 1,800 RPM |
| Fuel | Diesel | Diesel |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | Unregulated | Unregulated |
| Dry weight | — | — |
| Origin | China | China |
Choosing between Cummins 4BT3.9-G2 and Xinchai 4N28ZD
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.