Fiat Trattori 55-R
Built: 1954–1955 · Series: R-Baureihe
More machines from model year 1954
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
Fiat R series (1951–1968) – the wheeled tractors before the Nastro d'Oro: R for ruote, 25 R, 55 R, 18 R 'La Piccola', 211 R to 513 R and 80 R, the first digits as hp, 14 to 62 kW
The R in Fiat's type designation stands for ruote, wheels – the counterpart to the C of the crawlers – and the R series gathers the wheeled tractors with which Fiat Trattori motorised Italian agriculture from the early 1950s to the Nastro d'Oro of 1968. The 25 R of 1951 founded the post-war range, the 55 R followed in 1955 as the four-cylinder mid-range, the 18 R 'La Piccola' of 1957 was the small tractor for farms of a few hectares, and the three-digit 211 R, 312 R, 342 R and 513 R of 1958 to 1968 formed the generation that made Fiat Italy's largest tractor maker. The type logic: on the two-digit types the number gives the output in hp, on the three-digit ones the first digit the cylinder count and the following ones the hp in Fiat's reckoning – 211 R a two-cylinder, 513 R a four-cylinder of the upper class – and (A) marks four-wheel drive.
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The register lists 10 versions with 14 to 61.8 kW, 1,135 to 6,872 cm³ with two to four cylinders, torque from 63 to 412 Nm, unladen weights from 830 to 3,760 kg, lengths from 2,515 to 3,734 mm, widths from 1,203 to 1,990 mm and heights from 1,313 to 1,895 mm; eight models run on diesel, two optionally on petrol.
The R tractors were the tractors of the Italian economic miracle: simple, robust, built under licence in Argentina, Spain and Turkey – the root of the Fiat kinship that reaches to Fiat Concord and Türk Traktör.
Used R Fiats are collector tractors with a lively scene in Italy; when buying, engine condition, gearbox, originality and parts supply, which is good through Italian remanufacturers, are what count.
Sources: SpecCodex register, model data: Fiat Trattori R-Baureihe, Fiat Trattori (Wikipedia)
Technical data
Engine
| Fuel | dieselcorrect |
|---|---|
| Power | 55 hp (40.1 kW)correct |
| Rated speed | 1,440 rpmcorrect |
| Torque | 93 Nmcorrect |
| Speed at max. torque | 1,500 rpmcorrect |
| Cylinders | 4correct |
| Displacement | 6,546 cm³correct |
| Bore | 122 mmcorrect |
| Stroke | 140 mmcorrect |
| Compression ratio | 21.5correct |
| Cooling | water-cooledcorrect |
Dimensions and weights
| Length | 3,690 mmcorrect |
|---|---|
| Width | 1,990 mmcorrect |
| Height | 1,650 mmcorrect |
| Wheelbase | 2,240 mmcorrect |
| Ground clearance | 500 mmcorrect |
| Unladen weight | 3,760 kgcorrect |
Drivetrain and chassis
| Drive | rear-wheel drivecorrect |
|---|---|
| Gearbox | 5 V/1 Rcorrect |
| Front tyres | 7.50-18 ASFcorrect |
| Rear tyres | 14-34 AScorrect |
| Top speed | 20 km/hcorrect |
Origin and approval
| Construction | frame constructioncorrect |
|---|
Where this model stands
Power-to-weight ratio: 10.7 kW/t (40 kW / 3.8 t)
Power class: Universal (40–100 hp)
Stronger than 38% 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 Fiat Trattori 55-R have?
The Fiat Trattori 55-R delivers 55 hp.
How much does the Fiat Trattori 55-R weigh?
The unladen weight is 3,760 kg.
What engine does the Fiat Trattori 55-R have?
4 cylinders, 6,546 cm³ displacement, Diesel.
How fast does the Fiat Trattori 55-R go?
Top speed is 20 km/h.
What are the dimensions of the Fiat Trattori 55-R?
3,690 mm × 1,990 mm × 1,650 mm.
When was the Fiat Trattori 55-R built?
Production years: 1954–1955.
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.
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This page carries 24 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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Other models in this series
Sources: Wikibooks Traktorenlexikon (CC BY-SA 4.0) (retrieved August 2026) · How we check the data
Tractor in 3D section
Turn the model, look inside and click an assembly — each one is explained.
