Cummins QSK50-G6 vs Mitsubishi S8U-PTA
The Cummins QSK50-G6 and Mitsubishi S8U-PTA are both diesel generator engines in a similar power class. Both are rated at roughly 1,997 kVA. Displacement is 50.3 L versus 94.1 L. The table below compares their full specifications side by side.
| Specification | Cummins QSK50-G6 | Mitsubishi S8U-PTA |
|---|---|---|
| Headline rating | 2,000 kVA | 1,993 kVA |
| Standby (50 Hz) | — | 1,594.4 kWe |
| Prime (50 Hz) | — | 1,538.4 kWe |
| Standby (60 Hz) | 1,600 kWe | 1,712 kWe |
| Prime (60 Hz) | 1,455 kWe | 1,631.2 kWe |
| Displacement | 50.3 L | 94.1 L |
| Configuration | V16 | V8 |
| Cylinders | 16 | 8 |
| Rated speed | 1,800 RPM | 900 / 1,080 RPM |
| Fuel | Diesel | Diesel |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | U.S. EPA Tier 2 | Unregulated |
| Dry weight | — | 11000 kg |
| Origin | United States | Japan |
Choosing between Cummins QSK50-G6 and Mitsubishi S8U-PTA
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 QSK50-G6 has the higher headline kVA rating in this pair, but site conditions and duty cycle can still change the final recommendation.