Isuzu 4JG1T vs Kohler KDI2504TM
The Isuzu 4JG1T and Kohler KDI2504TM are both diesel generator engines in a similar power class. Both are rated at roughly 39 kVA. Displacement is 3.059 L versus 2.482 L. The table below compares their full specifications side by side.
| Specification | Isuzu 4JG1T | Kohler KDI2504TM |
|---|---|---|
| Headline rating | 39 kVA | 39 kVA |
| Standby (50 Hz) | 31.1 kWe | — |
| Prime (50 Hz) | 29.6 kWe | — |
| Standby (60 Hz) | 37.8 kWe | 31 kWe |
| Prime (60 Hz) | 36 kWe | 28 kWe |
| Displacement | 3.059 L | 2.482 L |
| Configuration | L4 | L4 |
| Cylinders | 4 | 4 |
| Rated speed | 1,500 / 1,800 RPM | 1,800 RPM |
| Fuel | Diesel | Diesel/HVO |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | Unregulated | U.S. EPA Tier 2 |
| Dry weight | — | 300 kg |
| Origin | Japan | Italy |
Choosing between Isuzu 4JG1T and Kohler KDI2504TM
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.