Doosan DB58 vs John Deere 4045HFG81
The Doosan DB58 and John Deere 4045HFG81 are both diesel generator engines in a similar power class. Both are rated at roughly 65 kVA. Displacement is 5.8 L versus 4.5 L. The table below compares their full specifications side by side.
| Specification | Doosan DB58 | John Deere 4045HFG81 |
|---|---|---|
| Headline rating | 64 kVA | 65 kVA |
| Standby (50 Hz) | 51.3 kWe | 52 kWe |
| Prime (50 Hz) | 48 kWe | 47 kWe |
| Standby (60 Hz) | — | 56 kWe |
| Prime (60 Hz) | — | 50 kWe |
| Displacement | 5.8 L | 4.5 L |
| Configuration | L6 | L4 |
| Cylinders | 6 | 4 |
| Rated speed | 1,500 RPM | 1,500 / 1,800 RPM |
| Fuel | Diesel | Diesel |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | U.S. EPA Tier 1 | Euro Stage IIIA / U.S. EPA Tier 3 |
| Dry weight | — | — |
| Origin | South Korea | United States |
Choosing between Doosan DB58 and John Deere 4045HFG81
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. The John Deere 4045HFG81 has the higher headline kVA rating in this pair, but site conditions and duty cycle can still change the final recommendation.