Cummins C125N6 vs PSI 8.1L T
The Cummins C125N6 and PSI 8.1L T are both natural gas generator engines in a similar power class. Both are rated at roughly 156 kVA. Displacement is 8.9 L versus 8.06 L. The table below compares their full specifications side by side.
| Specification | Cummins C125N6 | PSI 8.1L T |
|---|---|---|
| Headline rating | 156 kVA | 156 kVA |
| Standby (50 Hz) | — | 125 kWe |
| Prime (50 Hz) | — | 110 kWe |
| Standby (60 Hz) | 125 kWe | 155 kWe |
| Prime (60 Hz) | — | 125 kWe |
| Displacement | 8.9 L | 8.06 L |
| Configuration | L6 | L6 |
| Cylinders | 6 | 6 |
| Rated speed | 1,800 RPM | 1,500 / 1,800 RPM |
| Fuel | Natural Gas | Natural Gas |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | U.S. EPA Stationary | U.S. EPA Stationary |
| Dry weight | — | 998 kg |
| Origin | United States | United States |
Choosing between Cummins C125N6 and PSI 8.1L T
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.