SDEC 4Z2.9-G420 vs Xinchai 4N27BD
The SDEC 4Z2.9-G420 and Xinchai 4N27BD are both diesel generator engines in a similar power class. Both are rated at roughly 28 kVA. Displacement is 2.9 L versus 2.7 L. The table below compares their full specifications side by side.
| Specification | SDEC 4Z2.9-G420 | Xinchai 4N27BD |
|---|---|---|
| Headline rating | 28 kVA | 28 kVA |
| Standby (50 Hz) | 22 kWe | 22 kWe |
| Prime (50 Hz) | 20 kWe | 20 kWe |
| Standby (60 Hz) | — | 26 kWe |
| Prime (60 Hz) | — | 23 kWe |
| Displacement | 2.9 L | 2.7 L |
| Configuration | L4 | L4 |
| Cylinders | 4 | 4 |
| Rated speed | 1,500 RPM | 1,500 / 1,800 RPM |
| Fuel | Diesel | Diesel |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | China National Stage IV / Unregulated | Unregulated |
| Dry weight | — | — |
| Origin | China | China |
Choosing between SDEC 4Z2.9-G420 and Xinchai 4N27BD
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.