International Deering D-20
Built: 1910–1914 · Series: D-Serie
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International-Deering D-20 and D-25 – heavy single-cylinder paraffin tractors from 1930s Neuss, 290 rpm, unladen weight from 6,441 to 7,643 kg
The Deering name goes back to the Deering Harvester Company, which merged with McCormick in 1902 to form International Harvester; in Europe, and especially at the Neuss plant, International kept the Deering name on part of its tractor line into the 1930s and 1950s before the brand merged fully into the International name. The D-20 and D-25 are heavy, single-cylinder paraffin tractors from this transitional period, running at very low speed as was typical of engine design in the 1920s and 1930s. After the merger with Case in 1985, the Neuss site remained a plant for combine harvesters, while tractor production moved to other Case IH locations.
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The register lists 2 versions of 14.9 to 18.6 kW from a single cylinder at 290 rpm, unladen weights from 6,441 to 7,643 kg and widths from 2,210 to 2,438 mm; both run on paraffin.
Such slow-running single-cylinder paraffin tractors were common between the wars on large arable farms and for driving stationary machinery, such as threshers, via a belt pulley, before lighter, faster-running multi-cylinder engines displaced them from the 1930s.
Surviving D-20 and D-25 tractors are collectors' pieces today; on a used example what counts is the condition of cylinder and piston, tightness of the cooling system, the state of the belt pulley and ignition magneto, and rust on the massive cast chassis.
Sources: SpecCodex register, model data: International-Deering D-Serie
Technical data
Engine
| Fuel | Kerosincorrect |
|---|---|
| Power | 20.3 hp (14.9 kW)correct |
| Rated speed | 290 rpmcorrect |
| Cylinders | 1correct |
| Bore | 222.25 mmcorrect |
| Stroke | 381 mmcorrect |
| Cooling | water-cooledcorrect |
Dimensions and weights
| Width | 2,210 mmcorrect |
|---|---|
| Unladen weight | 6,441 kgcorrect |
Drivetrain and chassis
| Drive | rear-wheel drivecorrect |
|---|---|
| Gearbox | 1 V/1 Rcorrect |
| Front tyres | 40" x 10"correct |
| Rear tyres | 70" x 20"correct |
| Top speed | 3.4 km/hcorrect |
Origin and approval
| Construction | frame constructioncorrect |
|---|
Where this model stands
Power-to-weight ratio: 2.3 kW/t (15 kW / 6.4 t)
Power class: Compact (< 40 hp)
Stronger than 7% 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 International Deering D-20 have?
The International Deering D-20 delivers 20.3 hp.
How much does the International Deering D-20 weigh?
The unladen weight is 6,441 kg.
What engine does the International Deering D-20 have?
1 cylinders, Kerosin.
When was the International Deering D-20 built?
Production years: 1910–1914.
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 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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Other models in this series
Sources: [1]
Tractor in 3D section
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