John Deere 6090HFG85 vs SDEC SC12E420D2
The John Deere 6090HFG85 and SDEC SC12E420D2 are both diesel generator engines in a similar power class. Both are rated at roughly 347 kVA. Displacement is 9 L versus 12 L. The table below compares their full specifications side by side.
| Specification | John Deere 6090HFG85 | SDEC SC12E420D2 |
|---|---|---|
| Headline rating | 348 kVA | 346 kVA |
| Standby (50 Hz) | — | 277 kWe |
| Prime (50 Hz) | — | 252 kWe |
| Standby (60 Hz) | 278 kWe | — |
| Prime (60 Hz) | 252 kWe | — |
| Displacement | 9 L | 12 L |
| Configuration | L6 | L6 |
| Cylinders | 6 | 6 |
| Rated speed | 1,800 RPM | 1,500 RPM |
| Fuel | Diesel | Diesel |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | U.S. EPA Tier 3 | China National Stage II / Unregulated |
| Dry weight | — | — |
| Origin | United States | China |
Choosing between John Deere 6090HFG85 and SDEC SC12E420D2
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 John Deere 6090HFG85 has the higher headline kVA rating in this pair, but site conditions and duty cycle can still change the final recommendation.