Caterpillar C1.1 vs Perkins 403A11G1
The Caterpillar C1.1 and Perkins 403A11G1 are both diesel generator engines in a similar power class. The Perkins 403A11G1 is the higher-output unit (10 kVA vs 9 kVA). The table below compares their full specifications side by side.
| Specification | Caterpillar C1.1 | Perkins 403A11G1 |
|---|---|---|
| Headline rating | 9 kVA | 10 kVA |
| Standby (50 Hz) | 7.6 kWe | 8 kWe |
| Prime (50 Hz) | 6.8 kWe | 7 kWe |
| Standby (60 Hz) | 8.8 kWe | — |
| Prime (60 Hz) | 8 kWe | — |
| Displacement | 1.1 L | 1.1 L |
| Configuration | L3 | L3 |
| Cylinders | 3 | 3 |
| Rated speed | 1,500 / 1,800 RPM | 1,500 RPM |
| Fuel | Diesel | Diesel |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | Euro Stage IIIA | Unregulated |
| Dry weight | — | — |
| Origin | Japan | United States / United Kingdom |
Choosing between Caterpillar C1.1 and Perkins 403A11G1
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 Perkins 403A11G1 has the higher headline kVA rating in this pair, but site conditions and duty cycle can still change the final recommendation.