Irus Unitrac A12
Series: Unitrac
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Irus Unitrac A12 – light air-cooled two-cylinder petrol machine with 550 cm3 displacement, 700 kg weight and a 15 km/h top speed for yard and field.
The Unitrac A12 is a light, air-cooled two-cylinder petrol machine of 550 cm3 displacement. The name Unitrac stood, with several makers of the period, for versatile small carrier vehicles used for both yard work and light field tasks.
Read on 3 more paragraphs
At 700 kg, 4,000 mm long and 1,500 mm wide, the A12 is a compact, light machine. Its two-cylinder engine turns at 3,000 rpm, and its design top speed is only 15 km/h. This low top speed points to a pure work machine for yard and field rather than a vehicle intended for road transport.
Air-cooled two-cylinder petrol engines of around 550 cm3 were common on light carrier vehicles of this kind, since they stayed low-maintenance without a water cooling circuit while providing enough power for yard work, small trailers and mounted implements. With a top speed of 15 km/h, the A12 stays clearly below any driving licence class for open road traffic and was confined to the yard and to field tracks.
On a used A12, the cylinder cooling fins deserve attention, as air-cooled engines overheat quickly once the fins are dirty or damaged. Carburettor, spark plugs and the condition of the drive belts or chains belong on the basic check, along with the axle bearings on such a light vehicle. Parts for such rare small vehicles are usually only found through specialist collectors.
Sources: SpecCodex-Register: Kennwerte des Modells Irus Unitrac A12
Technical data
Engine
| Fuel | Benzin/Petrolcorrect |
|---|---|
| Power | 105 hpcorrect |
| Rated speed | 3,000 rpmcorrect |
| Cylinders | 2correct |
| Displacement | 550 cm³correct |
| Cooling | air-cooledcorrect |
Dimensions and weights
| Length | 4,000 mmcorrect |
|---|---|
| Width | 1,500 mmcorrect |
| Unladen weight | 700 kgcorrect |
Drivetrain and chassis
| Drive | four-wheel drivecorrect |
|---|---|
| Gearbox | wie U1200correct |
| Front tyres | 6.0/12correct |
| Rear tyres | 6.0/12correct |
| Top speed | 15 km/hcorrect |
Origin and approval
| Construction | Transportercorrect |
|---|---|
| Units built | unbekanntcorrect |
Where this model stands
Power-to-weight ratio: 110.3 kW/t (77 kW / 0.7 t)
Power class: Large (100–180 hp)
Stronger than 69% of the tractors in the register — out of 15,663 models with a stated power figure.
Calculated from the documented figures above — not a rating.
Frequently asked questions
How much power does the Irus Unitrac A12 have?
The Irus Unitrac A12 delivers 105 hp.
How much does the Irus Unitrac A12 weigh?
The unladen weight is 700 kg.
What engine does the Irus Unitrac A12 have?
2 cylinders, 550 cm³ displacement, Benzin/Petrol.
How fast does the Irus Unitrac A12 go?
Top speed is 15 km/h.
What are the dimensions of the Irus Unitrac A12?
4,000 mm × 1,500 mm.
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.
- Check front and rear tyre sizes: mismatched pairs strain the drivetrain.
- Shift the gearbox cold and warm — jumps only show up at temperature.
- Load the hydraulics and watch for sag.
- 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.
We do not sell machines. We ask the dealers who carry this model and come back with price and lead time.
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This page carries 16 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.
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Sources: [1]
Tractor in 3D section
Turn the model, look inside and click an assembly — each one is explained.