Cummins K38N-G6 vs Jenbacher J312
The Cummins K38N-G6 and Jenbacher J312 are both natural gas generator engines in a similar power class. The Jenbacher J312 is the higher-output unit (794 kVA vs 750 kVA). Displacement is 37.8 L versus 29.2 L. The table below compares their full specifications side by side.
| Specification | Cummins K38N-G6 | Jenbacher J312 |
|---|---|---|
| Headline rating | 750 kVA | 794 kVA |
| Standby (50 Hz) | — | — |
| Prime (50 Hz) | 600 kWe | 635 kWe |
| Standby (60 Hz) | — | — |
| Prime (60 Hz) | 600 kWe | — |
| Displacement | 37.8 L | 29.2 L |
| Configuration | V12 | V12 |
| Cylinders | 12 | 12 |
| Rated speed | 1,500 / 1,800 RPM | 1,500 RPM |
| Fuel | Natural Gas | Natural Gas |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | Unregulated | Unregulated |
| Dry weight | — | — |
| Origin | China | Austria |
Choosing between Cummins K38N-G6 and Jenbacher J312
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 Jenbacher J312 has the higher headline kVA rating in this pair, but site conditions and duty cycle can still change the final recommendation.