Caterpillar C3.3 vs John Deere 4045HFG81
The Caterpillar C3.3 and John Deere 4045HFG81 are both diesel generator engines in a similar power class. Both are rated at roughly 65 kVA. Displacement is 3.3 L versus 4.5 L. The table below compares their full specifications side by side.
| Specification | Caterpillar C3.3 | John Deere 4045HFG81 |
|---|---|---|
| Headline rating | 65 kVA | 65 kVA |
| Standby (50 Hz) | 52 kWe | 52 kWe |
| Prime (50 Hz) | 48 kWe | 47 kWe |
| Standby (60 Hz) | 60 kWe | 56 kWe |
| Prime (60 Hz) | 55 kWe | 50 kWe |
| Displacement | 3.3 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 | Unregulated | Euro Stage IIIA / U.S. EPA Tier 3 |
| Dry weight | — | — |
| Origin | United States | United States |
Choosing between Caterpillar C3.3 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.