Caterpillar C1.1 vs Perkins 403D-11G
The Caterpillar C1.1 and Perkins 403D-11G are both diesel generator engines in a similar power class. The Perkins 403D-11G 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 403D-11G |
|---|---|---|
| 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 | 10 kWe |
| Prime (60 Hz) | 8 kWe | 9 kWe |
| Displacement | 1.1 L | 1.1 L |
| Configuration | L3 | L3 |
| Cylinders | 3 | 3 |
| Rated speed | 1,500 / 1,800 RPM | 1,500 / 1,800 RPM |
| Fuel | Diesel | Diesel |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | Euro Stage IIIA | Euro Stage IIIA / U.S. EPA Tier 3 |
| Dry weight | — | — |
| Origin | Japan | China |
Choosing between Caterpillar C1.1 and Perkins 403D-11G
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 403D-11G has the higher headline kVA rating in this pair, but site conditions and duty cycle can still change the final recommendation.