Isuzu
Isuzu 4BD1 Engine Specs
B Series
The Isuzu 4BD1 is a 3.856 L naturally aspirated inline-4 diesel engine from the Isuzu B Series. This reference page summarizes the 4BD1 displacement, cylinder layout, power rating, compression ratio, datasheet sources and related Isuzu 4B/6B models for buyers comparing compact diesel engine specifications.
Overhaul & repair parts- Manufacturer files
- 2 datasheets
- Last updated
- 2026-08-04
- Package route
- diesel generator sets
- Maximum Mechanical Power
- 71 kW
- Cylinders
- L4
- Displacement
- 3.856 L
- Rated Speed
- 2,800 RPM
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Isuzu 4BD1 overhaul & repair parts
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Isuzu 4BD1 industrial power context
The Isuzu 4BD1 is a 3.856 L naturally aspirated inline-4 diesel engine from the Isuzu B Series. This reference page summarizes the 4BD1 displacement, cylinder layout, power rating, compression ratio, datasheet sources and related Isuzu 4B/6B models for buyers comparing compact diesel engine specifications.
Also searched as
What is the Isuzu 4BD1?
The Isuzu 4BD1 is a 3.856 L naturally aspirated inline-4 diesel engine in the Isuzu B Series. This page is built for 4BD1 engine specs searches: it lists the 70.6 kW / 96 hp maximum mechanical output at 2,800 rpm, 17.5:1 compression ratio, liquid cooling, diesel fuel, Japan origin and available manual/specification sources. Because the 4BD1 is a variable-speed industrial engine rather than a fixed-speed generator-drive rating, use the data here as an engine reference before confirming alternator sizing, package derating and replacement options.
Technical reference links
Compare the 4BD1 before choosing a diesel package
Haifeng Machinery can help compare the Isuzu 4BD1 with nearby diesel engine options, then review voltage, duty rating, enclosure, controls and export documentation for the complete generator package.
Technical Specifications
| Brand | Isuzu |
| Model | 4BD1 |
| Series | B Series |
| Configuration | L4, naturally aspirated |
| Cylinders | 4 |
| Displacement | 3.856 L |
| Compression Ratio | 17.5:1 |
| Fuel Type | Diesel |
| Ignition Type | Compression Ignition |
| Cooling Method | Liquid-Cooled |
| Emissions Standard | Unregulated |
| Country of Origin | Japan |
Frequently asked questions
What is the maximum power output of the Isuzu 4BD1?
The Isuzu 4BD1 has a maximum mechanical output of 70.6 kW at 2,800 rpm. This is a variable-speed off-road rating, not a fixed-speed generator-set rating.
What fuel does the Isuzu 4BD1 use?
The Isuzu 4BD1 is a diesel variable-speed industrial engine.
What is the displacement and cylinder configuration of the 4BD1?
The Isuzu 4BD1 is an inline-4 (4-cylinder) engine with a displacement of 3.856 L.
Is the 4BD1 still in production?
No — the Isuzu 4BD1 is discontinued. Its specifications and datasheets remain archived here for reference.
Are reference documents available for the 4BD1?
This page links reference documents for the Isuzu 4BD1. Check each document's title, model coverage, revision and rating conditions before using it for selection.