Deutz F4L912T vs Isuzu 4LE2X
The Deutz F4L912T and Isuzu 4LE2X are both diesel generator engines in a similar power class. Both are rated at roughly 51 kVA. Displacement is 3.77 L versus 2.179 L. The table below compares their full specifications side by side.
| Specification | Deutz F4L912T | Isuzu 4LE2X |
|---|---|---|
| Headline rating | 51 kVA | 51 kVA |
| Standby (50 Hz) | 40.5 kWe | 40.6 kWe |
| Prime (50 Hz) | 36.9 kWe | 36.9 kWe |
| Standby (60 Hz) | 46.8 kWe | 48.5 kWe |
| Prime (60 Hz) | 43.2 kWe | 44.1 kWe |
| Displacement | 3.77 L | 2.179 L |
| Configuration | L4 | L4 |
| Cylinders | 4 | 4 |
| Rated speed | 1,500 / 1,800 RPM | 1,500 / 1,800 RPM |
| Fuel | Diesel | Diesel |
| Cooling | Air-Cooled | Liquid-Cooled |
| Emissions | Unregulated | U.S. EPA Final Tier 4 |
| Dry weight | — | — |
| Origin | Germany | Japan |
Choosing between Deutz F4L912T and Isuzu 4LE2X
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.