Isuzu 4HK1X vs John Deere 4045HFG20
The Isuzu 4HK1X and John Deere 4045HFG20 are both diesel generator engines in a similar power class. Both are rated at roughly 134 kVA. Displacement is 5.193 L versus 4.5 L. The table below compares their full specifications side by side.
| Specification | Isuzu 4HK1X | John Deere 4045HFG20 |
|---|---|---|
| Headline rating | 134 kVA | 134 kVA |
| Standby (50 Hz) | 106.9 kWe | 107 kWe |
| Prime (50 Hz) | 97.2 kWe | 97 kWe |
| Standby (60 Hz) | 125.7 kWe | 116 kWe |
| Prime (60 Hz) | 114.3 kWe | 105 kWe |
| Displacement | 5.193 L | 4.5 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 | U.S. EPA Final Tier 4 | Unregulated |
| Dry weight | — | — |
| Origin | Japan | United States |
Choosing between Isuzu 4HK1X and John Deere 4045HFG20
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.