Sisu SK171
Built: 1989 · Series: Trucks over 12 t (Class N3)
More machines from model year 1989
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Sisu trucks over 12 tonnes (class N3) – Finnish specialist for timber haulage, construction and military use from Karjaa: E, C and D series with axle formulas up to 10X4, 94 to 530 kW, gross weights up to 72 tonnes
Sisu Auto is a Finnish niche manufacturer of heavy trucks with a plant at Karjaa (Raseborg), supplying mainly the timber-haulage, construction and Finnish military sectors with specialist vehicles; the brand descends from the former Vanaja/Sisu group and has operated under Finnish ownership since the 2010s. Type designations in the register follow no single pattern across the series but combine a series code (E, C, D, CK, CM) with an axle formula (6X2, 6X4, 8X2, 8X4, 10X4) and in places power figures; letter strings such as AKK or KKA denote drive and axle configurations for heavy combination transport under Sisu's factory naming.
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The register lists 259 versions with 94 to 530 kW output, displacements of 4,180 to 18,130 cm³ across 4 to 8 cylinders, unladen weights of 5,375 to 33,140 kg, gross weights of 12,050 to 72,160 kg and lengths of 5,370 to 13,400 mm at 2,280 to 2,800 mm width; the high gross weights of over 70 tonnes reflect Sisu's specialisation in heavy timber and abnormal-load haulage using multi-axle combinations.
As a niche manufacturer, Sisu competes in the Finnish and Nordic market less with the large European volume makers and more with suppliers specialising in bespoke solutions; the vehicles are built for extreme winter reliability, high payloads and long service life in forestry and construction work.
On used Sisu trucks, what particularly counts is the condition of the frame and crane bodies on forestry vehicles, the axles and differential locks on multi-axle combinations, engine and gearbox wear given the high operating hours typical of forestry work, and the limited but specialised parts supply through Finnish Sisu workshops.
Sources: SpecCodex register, model data: Sisu Lkw Klasse N3, Sisu Auto (manufacturer)
Technical data
Engine
| Power | 167 kWcorrect |
|---|---|
| Displacement | 7,360 cm³correct |
Dimensions and weights
| Length | 9,250 mmcorrect |
|---|---|
| Width | 2,500 mmcorrect |
| Unladen weight | 10,390 kgcorrect |
| Gross vehicle weight | 19,000 kgcorrect |
Drivetrain and chassis
| Gears | 6correct |
|---|
Where this model stands
Power-to-weight ratio: 16.1 kW/t (167 kW / 10.4 t)
Stronger than 22% of the trucks in the register — out of 25,241 models with a stated power figure.
Calculated from the documented figures above — not a rating.
Frequently asked questions
How much power does the Sisu SK171 have?
The Sisu SK171 delivers 167 kW.
How much does the Sisu SK171 weigh?
The unladen weight is 10,390 kg.
What is the gross vehicle weight of the Sisu SK171?
19,000 kg.
What engine does the Sisu SK171 have?
7,360 cm³ displacement.
What are the dimensions of the Sisu SK171?
9,250 mm × 2,500 mm.
When was the Sisu SK171 built?
Production years: 1989.
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 8 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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Other models in this series
12 E 480
14-168 CEV-8X2
15200cm3
2ov 14000cm3
2ov 15200cm3
2ov 15569cm3
2ov 6450cm3
2ov 6540cm3
2ov 6600cm3
2ov 7360cm3
480 E-TECH 10X4
7360cm3
Sources: [1]
Truck in 3D section
Turn the model, look inside and click an assembly — each one is explained.