Weichai
Weichai WP4.1D66E200
WP Series
The Weichai WP4.1D66E200 is a 4.1-litre inline-4 diesel engine for generator sets, rated at 74 kVA / 59 kWe standby power at 1,500 RPM (50 Hz). It is a liquid-cooled engine built in China.
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- Manufacturer files
- 3 datasheets
- Last updated
- 2026-05-29
- Package route
- diesel generator sets
- Standby Power · 50 Hz
- 74 kVA
- Electrical Output
- 59 kWe
- Cylinders
- L4
- Displacement
- 4.1 L
- Rated Speed
- 1,500 / 1,800 RPM
Power Ratings
kWm = mechanical shaft power · kWe = electrical output · kVA = kWe ÷ 0.8 pf
50 Hz1500 RPM
| kWm | kWe | kVA | |
|---|---|---|---|
| Prime Power | 60 | 54 | 67.5 |
| Standby Power | 65.6 | 59 | 73.8 |
60 Hz1800 RPM
| kWm | kWe | kVA | |
|---|---|---|---|
| Prime Power | 72.2 | 65 | 81.3 |
| Standby Power | 80 | 72 | 90 |
Weichai WP4.1D66E200 generator set context
The Weichai WP4.1D66E200 is listed here as a diesel generator-drive engine for 50 Hz and 60 Hz generator sets, with a headline 74 kVA / 59 kWe / 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.
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Technical Specifications
| Brand | Weichai |
| Model | WP4.1D66E200 |
| Series | WP Series |
| Configuration | L4 |
| Cylinders | 4 |
| Displacement | 4.1 L |
| Fuel Type | Diesel |
| Ignition Type | Compression Ignition |
| Cooling Method | Liquid-Cooled |
| Emissions Standard | China National Stage II / Unregulated |
| Country of Origin | China |
Frequently asked questions
What is the power output of the Weichai WP4.1D66E200?
The Weichai WP4.1D66E200 is rated at 74 kVA standby / 68 kVA prime at 50 Hz (1,500 rpm); and 90 kVA standby / 81 kVA prime at 60 Hz (1,800 rpm).
Does the WP4.1D66E200 run at 50 Hz or 60 Hz?
The Weichai WP4.1D66E200 is available for both 50 Hz (1,500 rpm) and 60 Hz (1,800 rpm).
What fuel does the Weichai WP4.1D66E200 use?
The Weichai WP4.1D66E200 is a diesel generator-set engine.
What is the displacement and cylinder configuration of the WP4.1D66E200?
The Weichai WP4.1D66E200 is an inline-4 (4-cylinder) engine with a displacement of 4.1 L.
Is the Weichai WP4.1D66E200 still in production?
Yes — the Weichai WP4.1D66E200 is a current production model.
Is a datasheet available for the WP4.1D66E200?
Yes — an official Weichai datasheet for the Weichai WP4.1D66E200 can be downloaded from this page.