Bergen B36:45V16 vs Wärtsilä 20V31SG
The Bergen B36:45V16 and Wärtsilä 20V31SG are both natural gas generator engines in a similar power class. The Wärtsilä 20V31SG is the higher-output unit (14,724 kVA vs 11,838 kVA). Displacement is 732.9 L versus 649.1 L. The table below compares their full specifications side by side.
| Specification | Bergen B36:45V16 | Wärtsilä 20V31SG |
|---|---|---|
| Headline rating | 11,838 kVA | 14,724 kVA |
| Standby (50 Hz) | — | — |
| Prime (50 Hz) | 9,470 kWe | 11,779 kWe |
| Standby (60 Hz) | — | — |
| Prime (60 Hz) | — | 11,377 kWe |
| Displacement | 732.9 L | 649.1 L |
| Configuration | V16 | V20 |
| Cylinders | 16 | 20 |
| Rated speed | 750 RPM | 750 / 900 RPM |
| Fuel | Natural Gas | Natural Gas |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | Unregulated | Unregulated |
| Dry weight | 150000 kg | — |
| Origin | Norway | Finland |
Choosing between Bergen B36:45V16 and Wärtsilä 20V31SG
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 Wärtsilä 20V31SG has the higher headline kVA rating in this pair, but site conditions and duty cycle can still change the final recommendation.