Caterpillar C3.3 vs Cummins 4BTAA3.3G14
The Caterpillar C3.3 and Cummins 4BTAA3.3G14 are both diesel generator engines in a similar power class. Both are rated at roughly 66 kVA. The table below compares their full specifications side by side.
| Specification | Caterpillar C3.3 | Cummins 4BTAA3.3G14 |
|---|---|---|
| Headline rating | 65 kVA | 66 kVA |
| Standby (50 Hz) | 52 kWe | 53 kWe |
| Prime (50 Hz) | 48 kWe | 48 kWe |
| Standby (60 Hz) | 60 kWe | — |
| Prime (60 Hz) | 55 kWe | — |
| Displacement | 3.3 L | 3.3 L |
| Configuration | L4 | L4 |
| Cylinders | 4 | 4 |
| Rated speed | 1,500 / 1,800 RPM | 1,500 RPM |
| Fuel | Diesel | Diesel |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | Unregulated | EU Stage IIIA |
| Dry weight | — | — |
| Origin | United States | India |
Choosing between Caterpillar C3.3 and Cummins 4BTAA3.3G14
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 Cummins 4BTAA3.3G14 has the higher headline kVA rating in this pair, but site conditions and duty cycle can still change the final recommendation.