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Rehlko KDI-TCF 1903U4/26 Industrial Diesel Engine

KDI‑TCF1903U4-26-diesel-engine
KDI‑TCF1903U4-26-diesel-engine
The Rehlko KDI‑TCF 1903U4/26 is a compact, high-performance diesel engine delivering 42 kW (56 hp) at 2600 rpm. With turbocharging and charge‑air cooling, it’s designed for equipment that needs strong power density, responsive torque, and dependable operation in demanding industrial and mobile applications.
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Quick Spec Check

Engine Series:
Industry Type:
Engine Speed:
Power kW:
Max Torque:
Emissions:
KDI Series
Industrial
2600 rpm
42
225 @ 1500rpm
EU STAGE IIIB, US TIER4 FINAL
The Rehlko KDI‑TCF 1903U4/26 is part of Rehlko’s KDI 1903 engine family and is rated at 42 kW (56 hp) @ 2600 rpm, making it a strong option for OEM machinery where performance and packaging efficiency need to coexist. The TCF configuration (turbocharged with charge‑air cooling) supports a punchy, usable power curve and helps maintain consistent output under working load — ideal for equipment that can’t afford to feel “flat” when it’s hot, busy, or operating continuously.
For OEMs, the KDI platform is built around modern diesel technology and is widely specified across construction, industrial, and specialist equipment. For service teams, the value is a well-documented engine family with clear variant identification, helping procurement and maintenance stay aligned over the engine’s lifecycle.
If you’re specifying this for a build or replacement, the key is to match the exact variant code (1903U4/26) and confirm the installation interfaces (mounting, cooling pack, intake/exhaust routing, and electrical connections). Share your existing engine code or application details and we’ll help confirm the correct match before ordering.
Engine Details
Information on the main core details of the engine
Engine Series

KDI Series
Industry Type

Industrial
Engine Perfomance
Engine Speed

2600 rpm
Power kW

42
Max Torque Nm

225 @ 1500rpm
Emissions Compliant
Emissions

EU STAGE IIIB, US TIER4 FINAL
Design Features
SAE Connection

SAE4/7.5
Radiator

Yes
Fan

Yes
Technical Features
Aspiration

Turbo Aftercooled
Cylinders

3
Injection System

DI
Injection Equipment

HPCR
EGR

Yes
DOC

Yes
DPF

No
CAC

Yes
Physical Characteristics
Engine Length

598mm
Engine Width

530mm
Engine Height

726mm
Engine Weight

233kg (Dry)

Technical Documents

Technical Datasheet

Parts & Warranty

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Troubleshoot issues, stay on top of maintenance, buy replacement parts, and get warranty information

Parts List

Applications

The Rehlko KDI‑TCF 1903U4/26 is well suited to compact machinery that needs strong output in a tight footprint. Typical applications include construction and utility equipment, industrial power units, pumps, compressors, and specialist OEM machinery where reliable performance and power density are priorities.
With a headline rating of 42 kW (56 hp) at 2600 rpm, it’s particularly relevant for equipment that needs confident working power without stepping up to a larger engine class. In many builds, the turbocharged, charge‑air‑cooled configuration helps maintain consistent performance under load and in warmer operating environments.
As with all KDI variants, correct selection comes down to matching the exact engine code and ensuring the integration package (cooling, air handling, exhaust routing, and electrical interfaces) suits the machine’s duty cycle. If you’re comparing multiple 1903 variants, we can help you choose the best fit based on operating speed, load profile, and packaging constraints.