Cummins 4B3.9-G1 vs Perkins 1103D-33G2
The Cummins 4B3.9-G1 and Perkins 1103D-33G2 are both diesel generator engines in a similar power class. Both are rated at roughly 35 kVA. Displacement is 3.9 L versus 3.3 L. The table below compares their full specifications side by side.
| Specification | Cummins 4B3.9-G1 | Perkins 1103D-33G2 |
|---|---|---|
| Headline rating | 34 kVA | 35 kVA |
| Standby (50 Hz) | 27 kWe | 28 kWe |
| Prime (50 Hz) | 22 kWe | 25 kWe |
| Standby (60 Hz) | — | — |
| Prime (60 Hz) | — | — |
| Displacement | 3.9 L | 3.3 L |
| Configuration | L4 | L3 |
| Cylinders | 4 | 3 |
| Rated speed | 1,500 RPM | 1,500 RPM |
| Fuel | Diesel | Diesel |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | Unregulated | Euro Stage IIIA / U.S. EPA Tier 3 |
| Dry weight | — | — |
| Origin | China | United Kingdom |