Perkins 1004-40 vs Perkins 402F-05(C0.5)
Compare Perkins 1004-40 and Perkins 402F-05(C0.5) by recorded output, operating duty, frequency and engine specifications. Their listed displacements are 3.99 L and 0.508 L, respectively. Start with the same duty and frequency, then check each model’s source and package conditions. These records alone do not establish interchangeability.
| Specification | Perkins 1004-40 | Perkins 402F-05(C0.5) |
|---|---|---|
| Standby electrical (50 Hz) | Not listed | Not listed |
| Prime electrical (50 Hz) | Not listed | Not listed |
| Standby electrical (60 Hz) | Not listed | Not listed |
| Prime electrical (60 Hz) | Not listed | Not listed |
| Other recorded mechanical power (duty unspecified) | 55 kW | 4 kW |
| Displacement | 3.99 L | 0.508 L |
| Configuration | L4 | L2 |
| Cylinders | 4 | 2 |
| Recorded engine speed | 2,200 RPM | 1,800 RPM |
| Fuel | Diesel | Diesel |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Recorded emissions classification | Unregulated | U.S. EPA Final Tier 4 |
| Dry weight | Not listed | Not listed |
| Origin | United Kingdom | United Kingdom |
Compare matching ratings
Read across a row to compare the same operating duty and frequency. kWe is electrical output; mechanical kW is power at the engine shaft. kVA is apparent electrical power and is shown only when kWe is missing, without converting it. “Not listed” means the record lacks that rating, not zero output. Continuous and prime duties are kept separate. Check source documents, units and site conditions before comparing values.
An emissions classification in the catalog is not proof of certification for your engine or installation. Confirm the exact model, applicable documents and generator configuration.
Perkins 1004-40: Review the model record and available supporting documents
Perkins 402F-05(C0.5): Review the model record and available supporting documents
Choosing between Perkins 1004-40 and Perkins 402F-05(C0.5)
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.