Deutz BF4M2011 vs SDEC 4ZT3.5-G21
The Deutz BF4M2011 and SDEC 4ZT3.5-G21 are both diesel generator engines in a similar power class. Both are rated at roughly 61 kVA. Displacement is 3.1 L versus 3.5 L. The table below compares their full specifications side by side.
| Specification | Deutz BF4M2011 | SDEC 4ZT3.5-G21 |
|---|---|---|
| Headline rating | 60 kVA | 61 kVA |
| Standby (50 Hz) | 48 kWe | 49 kWe |
| Prime (50 Hz) | 43.2 kWe | 44 kWe |
| Standby (60 Hz) | 55.2 kWe | 59 kWe |
| Prime (60 Hz) | 49.7 kWe | 54 kWe |
| Displacement | 3.1 L | 3.5 L |
| Configuration | L4 | L4 |
| Cylinders | 4 | 4 |
| Rated speed | 1,500 / 1,800 RPM | 1,500 / 1,800 RPM |
| Fuel | Diesel | Diesel |
| Cooling | Oil-Cooled | Liquid-Cooled |
| Emissions | Euro Stage IIIA | China National Stage II / Unregulated |
| Dry weight | — | — |
| Origin | Germany | China |
Choosing between Deutz BF4M2011 and SDEC 4ZT3.5-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 4ZT3.5-G21 has the higher headline kVA rating in this pair, but site conditions and duty cycle can still change the final recommendation.