Cummins QSL9G9 vs Lister Petter LP689EG4
The Cummins QSL9G9 and Lister Petter LP689EG4 are both diesel generator engines in a similar power class. Both are rated at roughly 300 kVA. Displacement is 8.8 L versus 8.9 L. The table below compares their full specifications side by side.
| Specification | Cummins QSL9G9 | Lister Petter LP689EG4 |
|---|---|---|
| Headline rating | 300 kVA | 300 kVA |
| Standby (50 Hz) | 240 kWe | 240 kWe |
| Prime (50 Hz) | 220 kWe | 220 kWe |
| Standby (60 Hz) | 275 kWe | 264 kWe |
| Prime (60 Hz) | 250 kWe | 240 kWe |
| Displacement | 8.8 L | 8.9 L |
| Configuration | L6 | L6 |
| Cylinders | 6 | 6 |
| Rated speed | 1,500 / 1,800 RPM | 1,500 / 1,800 RPM |
| Fuel | Diesel | Diesel |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | U.S. EPA Final Tier 4 / EU Stage IIIA | Euro Stage III |
| Dry weight | — | — |
| Origin | United States / United Kingdom | United Kingdom |
Choosing between Cummins QSL9G9 and Lister Petter LP689EG4
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.