Automobile Engine
Cummins B140 Truck Diesel Engine
Cummins B140 3.9 L 4-cylinder diesel engine, 138 hp (103 kW), 2 ratings for on-highway work. Each unit nameplate-verified.
Specifications
- Engine Model
- B140
- Displacement
- 3.9 L
- Cylinders & Configuration
- Inline 4, 4-cycle
- Rated Power Range
- 103 kW (138 hp) @ 2500 rpm
- Aspiration
- Turbo & Charge
- Applications
- On-Highway
- Documentation
- Nameplate verification + load-test record per serial number
Overview
The Cummins B140 is a 3.9 L 4-cylinder Cummins diesel engine supplied in 2 factory ratings from 138 hp (103 kW) to 138 hp (103 kW). Every rating listed on this page is a complete engine for on-highway duty, not a generator set, and each unit ships with its serial number recorded against the specification sheet that applies to it.
Ratings in this family differ in rated speed, peak torque and emissions tier rather than in displacement or cylinder count, so the choice between them is a duty-matching question. The specifications panel and the per-rating entries on this page are generated from the same source data, so a rating quoted here can be matched directly against a delivery document.
Specifications
The specifications panel lists the family-level values that are common to every B140 rating, including the 3.9 L displacement and the inline 4-cylinder layout. Ratings that share displacement and cylinder count but differ in output are listed individually in the model selection section.
Model Selection: B140 Ratings
Each entry in this section is one rating of the Cummins B140. The rated power is the output at the stated speed; the peak torque figure is the value the rating develops at the lower speed shown, which is what normally decides whether a rating suits a given machine. Each rating carries a stable anchor, so a single rating can be linked or quoted directly.
B140 33(BYC)
B140 33(BYC) — rated 103 kW (138 hp) at 2500 rpm; peak torque 502 N·m at 1500 rpm; emissions EuroIII.
B140 33(WF)
B140 33(WF) — rated 103 kW (138 hp) at 2500 rpm; peak torque 502 N·m at 1500 rpm; emissions EuroIII.
Applications
B140 engines in this family are normally specified for on-highway work.
On-highway: ratings are selected against the gross vehicle weight, the intended road speed and the emissions standard that applies in the destination market.
Emissions: the ratings listed here carry EuroIII. Where a market imposes a different standard, confirm the tier before ordering, because the same model number can be built to more than one tier.
Verification, Documentation and Ordering
Each engine is offered with nameplate verification + load-test record per serial number. That means the model and rating printed on the engine nameplate can be checked against the record issued for that serial number before shipment, which is the point most buyers of re-rated or re-exported engines want covered.
To receive a quotation, send the exact rating from the matrix above (for example B140 33(WF)), the machine or application it will drive, the quantity, and the destination port. If the rating you need is not listed, send the model and the required output and we will confirm whether it belongs to this family or to a neighbouring one.
Buyer tip: Send your B140 specification, quantity and destination port for a verified quotation and lead time.
Frequently Asked Questions
What displacement and cylinder count does the B140 use?
Every rating in this family shares the same 3.9 L displacement and inline 4-cylinder, 4-cycle configuration. Ratings differ in output, rated speed and emissions tier rather than in the base engine.
What is the difference between B140 33(BYC) and B140 33(WF)?
B140 33(BYC) is rated 103 kW (138 hp) at 2500 rpm with peak torque of 502 N·m, while B140 33(WF) is rated 103 kW (138 hp) at 2500 rpm with 502 N·m. They use the same base engine; the higher rating is the one to specify when the driven load needs the extra torque at the lower speed.
Which emissions tiers are available for the B140?
The ratings on this page are listed as EuroIII. Emissions tier is part of the rating definition, so state the tier your market requires when you request a quotation.
How is a B140 rating ordered?
Send the exact rating shown in the model selection table, the application it will drive, the quantity and the destination port. The engine is then quoted against that rating and confirmed against its nameplate and load-test record.
At what speed is the B140 rated?
The ratings on this page are governed at 2500 rpm. Rated speed fixes the speed the driven machine sees through its gearing, so confirm the governed speed before ordering rather than relying on the power figure alone.
What peak torque does the B140 develop?
The rating listed here develops 502 N·m of peak torque at the lower speed shown.
Is the B140 a complete engine or a generator set?
Every entry on this page is a complete engine. Generator sets and packaged gen-sets are listed separately from this family and are not included here.
