Wilhelm Mayer Stahlpferd
Built: 1928–1931 · Series: Other models
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Wilhelm Mayer Stahlpferd – single-cylinder tractor with evaporative cooling, built 1928 to 1931: 8 hp, 1,100 kg weight, top speed of just 6 km/h, an early motorised replacement for the draught horse
The Stahlpferd by Wilhelm Mayer was built between 1928 and 1931 and belongs to the early small tractors of the interwar years, whose name already hints at its purpose: a motorised replacement for the draught horse on smaller farms. Nothing certain can be said about the company's own history from the recorded values, so the description below stays with the machine class.
Read on 3 more paragraphs
The single-cylinder engine is tempered by evaporative cooling and produces 8 hp. At 1,100 kg with a design top speed of just 6 km/h, the Stahlpferd was a very slow but, for its power class, comparatively heavy machine, built for draught work rather than road travel.
Such early single-cylinder tractors worked almost exclusively at walking pace, replacing draught animals for ploughing, harrowing and haulage on small and medium farms. Evaporative cooling without a water pump was typical of the period and made the engines simple to maintain, though prone to coolant loss under sustained load over long working hours.
When buying a used tractor this old, the condition of the crankshaft and cylinder, the tightness of the evaporative cooling and the state of the belt and chain drives, which have often already been replaced, matter most. As original spare parts for machinery of this era are barely available new any more, the value is usually decided by the condition of the parts, sometimes remanufactured, that remain on the machine.
Sources: SpecCodex-Register: Kennwerte des Modells Wilhelm Mayer Stahlpferd
Technical data
Engine
| Power | 8 hpcorrect |
|---|---|
| Rated output | 8correct |
| Cylinders | 1correct |
| Displacement | Kühlsystemcorrect |
| Cooling | Verdampferkühlungcorrect |
Dimensions and weights
| Unladen weight | 1,100 kgcorrect |
|---|
Drivetrain and chassis
| Drive | rear-wheel drivecorrect |
|---|---|
| Gearbox | 1/1correct |
| Top speed | 6 km/hcorrect |
Origin and approval
| Construction | frame constructioncorrect |
|---|---|
| Units built | 30correct |
| Production period | 1,928correct |
Other data
| Motorbearbeiten hersteller | Deutzcorrect |
|---|---|
| Stahlpferd bauweise | frame constructioncorrect |
| Standard tyres | Motorcorrect |
| Units built | 30 Maßecorrect |
| Unladen weight | 1100 kgcorrect |
| Verdampferkühlung antrieb antriebstyp | Hinterradcorrect |
Where this model stands
Power-to-weight ratio: 5.3 kW/t (6 kW / 1.1 t)
Power class: Compact (< 40 hp)
Stronger than 1% 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 Wilhelm Mayer Stahlpferd have?
The Wilhelm Mayer Stahlpferd delivers 8 hp.
How much does the Wilhelm Mayer Stahlpferd weigh?
The unladen weight is 1,100 kg.
What engine does the Wilhelm Mayer Stahlpferd have?
1 cylinders.
How fast does the Wilhelm Mayer Stahlpferd go?
Top speed is 6 km/h.
When was the Wilhelm Mayer Stahlpferd built?
Production years: 1928–1931.
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.
- 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 20 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: 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.
