Isuzu INDUSTRIAL ENGINES
DiscontinuedIsuzu 4BD1
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.
Cylinders / Config
L4, naturally aspirated
Displacement
3.856 L
Mechanical & Electrical 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.
Is a datasheet available for the 4BD1?
Yes — an official Isuzu datasheet for the Isuzu 4BD1 can be downloaded from this page.