Jenbacher J620 vs Waukesha 275GL+ 16V
The Jenbacher J620 and Waukesha 275GL+ 16V are both natural gas generator engines in a similar power class. The Waukesha 275GL+ 16V is the higher-output unit (4,520 kVA vs 4,186 kVA). Displacement is 124.8 L versus 285 L. The table below compares their full specifications side by side.
| Specification | Jenbacher J620 | Waukesha 275GL+ 16V |
|---|---|---|
| Headline rating | 4,186 kVA | 4,520 kVA |
| Standby (50 Hz) | — | — |
| Prime (50 Hz) | 3,349 kWe | 3,616 kWe |
| Standby (60 Hz) | — | — |
| Prime (60 Hz) | 3,328 kWe | — |
| Displacement | 124.8 L | 285 L |
| Configuration | V20 | V16 |
| Cylinders | 20 | 16 |
| Rated speed | 1,500 / 1,500 RPM | 1,000 RPM |
| Fuel | Natural Gas | Natural Gas |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | Unregulated | Unregulated |
| Dry weight | — | — |
| Origin | Austria | United States |
Choosing between Jenbacher J620 and Waukesha 275GL+ 16V
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 Waukesha 275GL+ 16V has the higher headline kVA rating in this pair, but site conditions and duty cycle can still change the final recommendation.