Cummins 4BTAA3.3G14 vs Perkins 904J-E36TAG3
The Cummins 4BTAA3.3G14 and Perkins 904J-E36TAG3 are both diesel generator engines in a similar power class. Both are rated at roughly 66 kVA. Displacement is 3.3 L versus 3.6 L. The table below compares their full specifications side by side.
| Specification | Cummins 4BTAA3.3G14 | Perkins 904J-E36TAG3 |
|---|---|---|
| Headline rating | 66 kVA | 66 kVA |
| Standby (50 Hz) | 53 kWe | 53 kWe |
| Prime (50 Hz) | 48 kWe | 48 kWe |
| Standby (60 Hz) | — | — |
| Prime (60 Hz) | — | — |
| Displacement | 3.3 L | 3.6 L |
| Configuration | L4 | L4 |
| Cylinders | 4 | 4 |
| Rated speed | 1,500 RPM | 1,500 RPM |
| Fuel | Diesel | Diesel |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | EU Stage IIIA | Euro Stage V / U.S. EPA Final Tier 4 |
| Dry weight | — | — |
| Origin | India | United Kingdom |
Choosing between Cummins 4BTAA3.3G14 and Perkins 904J-E36TAG3
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.