Perkins 903-27 vs Yanmar 4TNV98-ZGGES
The Perkins 903-27 and Yanmar 4TNV98-ZGGES are both diesel generator engines in a similar power class. Both are rated at roughly 38 kVA. Displacement is 2.7 L versus 3.119 L. The table below compares their full specifications side by side.
| Specification | Perkins 903-27 | Yanmar 4TNV98-ZGGES |
|---|---|---|
| Headline rating | 38 kVA | 38 kVA |
| Standby (50 Hz) | — | 30.5 kWe |
| Prime (50 Hz) | — | — |
| Standby (60 Hz) | 30.3 kWe | 36.7 kWe |
| Prime (60 Hz) | 27.4 kWe | — |
| Displacement | 2.7 L | 3.119 L |
| Configuration | L3 | L4 |
| Cylinders | 3 | 4 |
| Rated speed | 1,800 RPM | 1,500 / 1,800 RPM |
| Fuel | Diesel | Diesel |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | Unregulated | U.S. EPA Tier 3 |
| Dry weight | 341 kg | — |
| Origin | United Kingdom | Japan |
Choosing between Perkins 903-27 and Yanmar 4TNV98-ZGGES
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.