Isuzu 4JJ1X vs Sida Power 4BMZ1
The Isuzu 4JJ1X and Sida Power 4BMZ1 are both diesel generator engines in a similar power class. Both are rated at roughly 71 kVA. Displacement is 2.999 L versus 3.8 L. The table below compares their full specifications side by side.
| Specification | Isuzu 4JJ1X | Sida Power 4BMZ1 |
|---|---|---|
| Headline rating | 71 kVA | 70 kVA |
| Standby (50 Hz) | 56.4 kWe | 56 kWe |
| Prime (50 Hz) | 51.3 kWe | 52 kWe |
| Standby (60 Hz) | 70.3 kWe | 64 kWe |
| Prime (60 Hz) | 63.9 kWe | 60 kWe |
| Displacement | 2.999 L | 3.8 L |
| Configuration | L4 | L4 |
| Cylinders | 4 | 4 |
| Rated speed | 1,500 / 1,800 RPM | 1,500 / 1,800 RPM |
| Fuel | Diesel | Diesel |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | U.S. EPA Final Tier 4 | Application-dependent |
| Dry weight | — | 390 kg |
| Origin | Japan | China |
Choosing between Isuzu 4JJ1X and Sida Power 4BMZ1
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 Isuzu 4JJ1X has the higher headline kVA rating in this pair, but site conditions and duty cycle can still change the final recommendation.