Deutz F6L912T vs SDEC 4ZT4.1-G21
The Deutz F6L912T and SDEC 4ZT4.1-G21 are both diesel generator engines in a similar power class. Both are rated at roughly 74 kVA. Displacement is 5.655 L versus 4.1 L. The table below compares their full specifications side by side.
| Specification | Deutz F6L912T | SDEC 4ZT4.1-G21 |
|---|---|---|
| Headline rating | 73 kVA | 74 kVA |
| Standby (50 Hz) | 58.5 kWe | 59 kWe |
| Prime (50 Hz) | 54.9 kWe | 54 kWe |
| Standby (60 Hz) | 69.3 kWe | 69 kWe |
| Prime (60 Hz) | 64.8 kWe | 63 kWe |
| Displacement | 5.655 L | 4.1 L |
| Configuration | L6 | L4 |
| Cylinders | 6 | 4 |
| Rated speed | 1,500 / 1,800 RPM | 1,500 / 1,800 RPM |
| Fuel | Diesel | Diesel |
| Cooling | Air-Cooled | Liquid-Cooled |
| Emissions | Unregulated | China National Stage II / Unregulated |
| Dry weight | — | — |
| Origin | Germany | China |
Choosing between Deutz F6L912T and SDEC 4ZT4.1-G21
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 SDEC 4ZT4.1-G21 has the higher headline kVA rating in this pair, but site conditions and duty cycle can still change the final recommendation.