Sisu K-138SV/4300
Built: 1963-1967 · Series: K-138SV
More machines from model year 1963
Not the right version? The data comes from vehicle registers holding many near-identical versions side by side. Photograph the data plate — we read make and type from it. Open the scanner e-mail address required
Sisu K-138SV – a medium-heavy series from the Finnish maker in Karis/Hämeenlinna: 6.54-litre six-cylinder engine from 99.3 to 99.5 kW, gross weight 12,500 to 15,000 kg
Sisu K-138SV comes from the Finnish commercial-vehicle maker Sisu, which traditionally builds its trucks in Karis and Hämeenlinna, supplying heavy chassis mainly for forestry and construction work. The model suffixes 4300, 4300-6, 4500 and 4800 within the K-138SV series denote different wheelbase and body variants of this type.
Read on 4 more paragraphs
The register lists 5 versions here with a 6.54-litre six-cylinder engine, outputs from 99.3 to 99.5 kW, kerb weights from 4,310 to 6,300 kg, gross vehicle weights from 12,500 to 15,000 kg, and lengths from 6,650 to 7,450 mm with widths from 2,350 to 2,500 mm.
In this medium-heavy weight class, the K-138SV was sought after in Finland as a chassis for construction and municipal work as well as timber haulage, a market segment where Sisu has traditionally held its own niche in its home market alongside international makes such as Scania, Volvo and MAN.
For a used example, check the chassis and axles for corrosion and wear, clutch and gearbox condition, air brake system operation, and the tightness of hydraulics and fittings from the respective body builder; parts run through Sisu and Finnish commercial workshops.
With gross vehicle weights from 12,500 to 15,000 kg, these chassis belong to EU class N3 (over 12 t); operating them requires a category CE driving licence, a tachograph and compliance with driving and rest times. For timber haulage and construction work on unstable ground, a robust leaf-spring suspension on the rear axle was usually used, unlike the air suspension on vehicles for purely long-haul transport.
Sources: SpecCodex register, model data: Sisu K-138SV
Technical data
Engine
| Power | 99.5 kWcorrect |
|---|---|
| Cylinders | 6correct |
| Displacement | 6,540 cm³correct |
Dimensions and weights
| Length | 6,950 mmcorrect |
|---|---|
| Width | 2,430 mmcorrect |
| Unladen weight | 5,640 kgcorrect |
| Gross vehicle weight | 15,000 kgcorrect |
Drivetrain and chassis
| Gears | 5correct |
|---|
Where this model stands
Power-to-weight ratio: 17.6 kW/t (100 kW / 5.6 t)
Stronger than 6% of the trucks in the register — out of 25,242 models with a stated power figure.
Calculated from the documented figures above — not a rating.
Frequently asked questions
How much power does the Sisu K-138SV/4300 have?
The Sisu K-138SV/4300 delivers 99.5 kW.
How much does the Sisu K-138SV/4300 weigh?
The unladen weight is 5,640 kg.
What is the gross vehicle weight of the Sisu K-138SV/4300?
15,000 kg.
What engine does the Sisu K-138SV/4300 have?
6 cylinders, 6,540 cm³ displacement.
What are the dimensions of the Sisu K-138SV/4300?
6,950 mm × 2,430 mm.
When was the Sisu K-138SV/4300 built?
Production years: 1963-1967.
What to check before buying
- Check the hour meter against the service records — a replaced instrument is the most common gap.
- Compare the data plate and chassis number with the papers.
- Check the weights in the papers against the figures here — attachments change them.
- Ask about parts availability for this build year — the running costs hang on it.
A general list for this type of machine — no substitute for an inspection or an appraiser.
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This page carries 9 individual figures for this model. They come from 1 recorded source; every figure can be traced there. What we cannot document is not here — we leave gaps open rather than estimate them.
The technical data on this page comes from official vehicle registration records (RDW/Traficom), not from the manufacturer.
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Sources: Traficom — Finnish vehicle register (retrieved August 2026) · How we check the data
Truck in 3D section
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