Bergen B36:45V20 vs Wärtsilä 20V31SG
The Bergen B36:45V20 and Wärtsilä 20V31SG are both natural gas generator engines in a similar power class. Both are rated at roughly 14,756 kVA. Displacement is 916.1 L versus 649.1 L. The table below compares their full specifications side by side.
| Specification | Bergen B36:45V20 | Wärtsilä 20V31SG |
|---|---|---|
| Headline rating | 14,788 kVA | 14,724 kVA |
| Standby (50 Hz) | — | — |
| Prime (50 Hz) | 11,830 kWe | 11,779 kWe |
| Standby (60 Hz) | — | — |
| Prime (60 Hz) | — | 11,377 kWe |
| Displacement | 916.1 L | 649.1 L |
| Configuration | V20 | V20 |
| Cylinders | 20 | 20 |
| Rated speed | 750 RPM | 750 / 900 RPM |
| Fuel | Natural Gas | Natural Gas |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | Unregulated | Unregulated |
| Dry weight | 170000 kg | — |
| Origin | Norway | Finland |
Choosing between Bergen B36:45V20 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 Bergen B36:45V20 has the higher headline kVA rating in this pair, but site conditions and duty cycle can still change the final recommendation.