Kohler KDI1903M vs Yunnei DEF20NKA4
The Kohler KDI1903M and Yunnei DEF20NKA4 are both diesel/hvo generator engines in a similar power class. Both are rated at roughly 21 kVA. Displacement is 1.861 L versus 2 L. The table below compares their full specifications side by side.
| Specification | Kohler KDI1903M | Yunnei DEF20NKA4 |
|---|---|---|
| Headline rating | 21 kVA | 21 kVA |
| Standby (50 Hz) | — | — |
| Prime (50 Hz) | — | 17 kWe |
| Standby (60 Hz) | 17 kWe | — |
| Prime (60 Hz) | 15 kWe | — |
| Displacement | 1.861 L | 2 L |
| Configuration | L3 | L4 |
| Cylinders | 3 | 4 |
| Rated speed | 1,800 RPM | 1,500 RPM |
| Fuel | Diesel/HVO | Diesel |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | U.S. EPA Final Tier 4 | Euro Stage V |
| Dry weight | — | — |
| Origin | Italy | China |
Choosing between Kohler KDI1903M and Yunnei DEF20NKA4
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.