Jenbacher J920 FleXtra vs Wärtsilä 20V31SG
Compare Jenbacher J920 FleXtra and Wärtsilä 20V31SG by catalog output, operating duty, frequency and engine specifications. Start with the same duty and frequency, then check each model’s source and package conditions. These records alone do not establish interchangeability.
| Specification | Jenbacher J920 FleXtra | Wärtsilä 20V31SG |
|---|---|---|
| Standby electrical (50 Hz) | Not listed | Not listed |
| Prime electrical (50 Hz) | 10,606 kWe | 11,779 kWe |
| Standby electrical (60 Hz) | Not listed | Not listed |
| Prime electrical (60 Hz) | 9,542 kWe | 11,377 kWe |
| Other recorded mechanical power (duty unspecified) | 10,606 kW | 11,779 kW |
| Displacement | Not listed | 649.1 L |
| Configuration | V20 | V20 |
| Cylinders | 20 | 20 |
| Recorded engine speed | 1,000 RPM | 750 RPM |
| Fuel | Natural Gas | Natural Gas |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Recorded emissions classification | Unregulated | Unregulated |
| Dry weight | Not listed | Not listed |
| Origin | Austria | Finland |
Compare matching ratings
Read across a row to compare the same operating duty and frequency. kWe is electrical output; mechanical kW is power at the engine shaft. kVA is apparent electrical power and is shown only when kWe is missing, without converting it. “Not listed” means the record lacks that rating, not zero output. Continuous and prime duties are kept separate. Check source documents, units and site conditions before comparing values.
An emissions classification in the catalog is not proof of certification for your engine or installation. Confirm the exact model, applicable documents and generator configuration.
Jenbacher J920 FleXtra: Review the model record and available supporting documents
Wärtsilä 20V31SG: Review the model record and available supporting documents
Choosing between Jenbacher J920 FleXtra 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.