Jenbacher J312 vs Waukesha VGF36GSI/GSID (L36GSI/GSID)
The Jenbacher J312 and Waukesha VGF36GSI/GSID (L36GSI/GSID) are both natural gas generator engines in a similar power class. Both are rated at roughly 785 kVA. Displacement is 29.2 L versus 36 L. The table below compares their full specifications side by side.
| Specification | Jenbacher J312 | Waukesha VGF36GSI/GSID (L36GSI/GSID) |
|---|---|---|
| Headline rating | 794 kVA | 775 kVA |
| Standby (50 Hz) | — | — |
| Prime (50 Hz) | 635 kWe | — |
| Standby (60 Hz) | — | 620 kWe |
| Prime (60 Hz) | 635 kWe | 560 kWe |
| Displacement | 29.2 L | 36 L |
| Configuration | V12 | V12 |
| Cylinders | 12 | 12 |
| Rated speed | 1,500 / 1,800 RPM | 1,800 RPM |
| Fuel | Natural Gas | Natural Gas |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | Unregulated | Unregulated |
| Dry weight | — | — |
| Origin | Austria | United States |
Choosing between Jenbacher J312 and Waukesha VGF36GSI/GSID (L36GSI/GSID)
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.