Weichai
Weichai WP4.1D120E201
Weichai WP4.1D120E201. Source: 发动机数据单-WP4.1-0005_WP4.1D120E201_NonRad无散热器_Datasheet_25-11-25.pdf, p.1. Gross engine mechanical PRP 105 kW / ESP 120 kW at 1800 rpm. Net power is configuration-dependent and separate from gross mechanical output; no electrical genset output inferred. Emissions statement as printed: Unregulated; no additional certification inferred. Production status is unknown; discontinued is the user-authorized catalogue classification, not manufacturer-confirmed cessation. No production-end year asserted. Physical specifications added from manufacturer datasheets, 2026-10-21: compression ratio 17.5:1; dry engine weight 400 kg without radiator and radiator pipes; overall dimensions without radiator (L × W × H) 1158 × 732 × 883 mm. Sources: 发动机数据单-WP4.1-0005_WP4.1D120E201_NonRad无散热器_Datasheet_25-11-25.pdf (physical data on pp.1–2). Existing populated specification fields were not overwritten. Weight is dry engine weight, not genset shipping weight.
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- 1 document · 1 datasheet
- Last updated
- 2026-10-21
- Package route
- diesel generator sets
- Mechanical Output
- 120 kW
- Cylinders
- L4
- Displacement
- 4.087 L
- Rated Speed
- 1,800 RPM
Power Ratings
kWm = mechanical shaft power · kWe = electrical output · kVA = kWe ÷ 0.8 pf
60 Hz1800 RPM
| kWm | kWe | kVA | |
|---|---|---|---|
| Prime Power | 105 | — | — |
| Standby Power | 120 | — | — |
Estimated rating: 108 kWe (120 kW × 0.90) · 60 Hz · standby
Estimated rating: 94.5 kWe (105 kW × 0.90) · 60 Hz · prime
Planning estimate, not a manufacturer generator rating. Confirm the alternator, engine speed and operating conditions.
Weichai WP4.1D120E201 overhaul & repair parts
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Weichai WP4.1D120E201 generator set context
The Weichai WP4.1D120E201 is listed here as a diesel generator-drive engine for 60 Hz generator sets, with a headline 120 kW / standby rating. Use this page to compare the published engine output, electrical kWe/kVA ratings, emissions level, datasheet availability, and neighboring models before specifying an alternator, controller, enclosure, voltage, and compliance package.
Model name formats
Technical Specifications
| Brand | Weichai |
| Model | WP4.1D120E201 |
| Configuration | L4 |
| Cylinders | 4 |
| Displacement | 4.087 L |
| Compression Ratio | 17.5:1 |
| Dry Weight | 400 kg |
| Dimensions (L×W×H) | 1158 × 732 × 883 mm |
| Fuel Type | Diesel |
| Ignition Type | Compression Ignition |
| Cooling Method | Liquid-Cooled |
| Emissions Standard | Unregulated |
Frequently asked questions
Does the WP4.1D120E201 run at 50 Hz or 60 Hz?
The Weichai WP4.1D120E201 is rated for 60 Hz (1,800 rpm).
What fuel does the Weichai WP4.1D120E201 use?
The Weichai WP4.1D120E201 is a diesel generator-set engine.
What is the displacement and cylinder configuration of the WP4.1D120E201?
The Weichai WP4.1D120E201 is an inline-4 (4-cylinder) engine with a displacement of 4.087 L.
Is the WP4.1D120E201 still in production?
No — the Weichai WP4.1D120E201 is discontinued. Its specifications and datasheets remain archived here for reference.
Are reference documents available for the WP4.1D120E201?
This page links reference documents for the Weichai WP4.1D120E201. Check each document's title, model coverage, revision and rating conditions before using it for selection.