Cummins QSK38-G10 vs Kohler KD27V12
The Cummins QSK38-G10 and Kohler KD27V12 are both diesel generator engines in a similar power class. Both are rated at roughly 1,123 kVA. Displacement is 37.8 L versus 27 L. The table below compares their full specifications side by side.
| Specification | Cummins QSK38-G10 | Kohler KD27V12 |
|---|---|---|
| Headline rating | 1,121 kVA | 1,125 kVA |
| Standby (50 Hz) | 897 kWe | 900 kWe |
| Prime (50 Hz) | 813 kWe | 820 kWe |
| Standby (60 Hz) | — | 1,000 kWe |
| Prime (60 Hz) | — | 910 kWe |
| Displacement | 37.8 L | 27 L |
| Configuration | V12 | V12 |
| Cylinders | 12 | 12 |
| Rated speed | 1,500 RPM | 1,500 / 1,800 RPM |
| Fuel | Diesel | Diesel |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | China National Stage III / Unregulated | U.S. EPA Tier 2 |
| Dry weight | — | — |
| Origin | China | France |
Choosing between Cummins QSK38-G10 and Kohler KD27V12
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 Kohler KD27V12 has the higher headline kVA rating in this pair, but site conditions and duty cycle can still change the final recommendation.