Heinrich Lanz FMD
Built: 1921–1925 · Series: Feldmotor
Heinrich Lanz Feldmotor FMD: water-cooled four-cylinder petrol tractor, 8,340 cc, 38 hp/27.8 kW and 3,800 kg weight, from the early 1920s
The Feldmotor was an early series from Heinrich Lanz of Mannheim from the 1920s, from a time when the manufacturer still had petrol-powered draft machines in its range alongside its first Bulldog diesel tractors. The FMD model represents one of these early, multi-cylinder versions before the final shift to the single-cylinder Bulldog concept that would later define the brand.
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The FMD is powered by a water-cooled four-cylinder petrol engine of 8,340 cc, producing 38 hp, or 27.8 kW, at 750 rpm. At a weight of 3,800 kg, a length of 3,675 mm, a height of 2,000 mm and a width of 1,600 mm, with a wheelbase of 2,250 mm, the machine is a heavy tractor whose top speed of 6.9 km/h was built purely for draft work.
A large-displacement four-cylinder of over 8 litres running at just 750 rpm delivers its torque already at the lowest speeds and was typical of the heavy draft work of those years, when tractors mainly drove the plough, harrow and stationary threshing machines via the belt. Such a machine was built for heavy tillage and driving work machines, not for road transport.
When buying such an old Feldmotor, the condition of the frame, radiator and cylinder block of the large four-cylinder matters most, as far as these components survive in original form. A vehicle of this age is generally a collector's piece, for which parts can only be sourced through custom fabrication or from specialist vintage-vehicle restorers.
Sources: SpecCodex-Register: Kennwerte des Modells Heinrich Lanz Feldmotor FMD
Technical data
Engine
| Fuel | petrolcorrect |
|---|---|
| Power | 38 hp (27.8 kW)correct |
| Rated speed | 750 rpmcorrect |
| Cylinders | 4correct |
| Displacement | 8,340 cm³correct |
| Bore | 125 mmcorrect |
| Stroke | 170 mmcorrect |
| Cooling | water-cooledcorrect |
Dimensions and weights
| Length | 3,675 mmcorrect |
|---|---|
| Width | 1,600 mmcorrect |
| Height | 2,000 mmcorrect |
| Wheelbase | 2,250 mmcorrect |
| Unladen weight | 3,800 kgcorrect |
Drivetrain and chassis
| Drive | rear-wheel drivecorrect |
|---|---|
| Gearbox | 3V/1Rcorrect |
| Rear tyres | 1,600correct |
| Top speed | 6.9 km/hcorrect |
Origin and approval
| Construction | frame constructioncorrect |
|---|---|
| Units built | ca. 200correct |
Where this model stands
Power-to-weight ratio: 7.3 kW/t (28 kW / 3.8 t)
Power class: Compact (< 40 hp)
Stronger than 23% 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 Heinrich Lanz FMD have?
The Heinrich Lanz FMD delivers 38 hp.
How much does the Heinrich Lanz FMD weigh?
The unladen weight is 3,800 kg.
What engine does the Heinrich Lanz FMD have?
4 cylinders, 8,340 cm³ displacement, Benzin.
How fast does the Heinrich Lanz FMD go?
Top speed is 6.9 km/h.
What are the dimensions of the Heinrich Lanz FMD?
3,675 mm × 1,600 mm × 2,000 mm.
When was the Heinrich Lanz FMD built?
Production years: 1921–1925.
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 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: [1]
Tractor in 3D section
Turn the model, look inside and click an assembly — each one is explained.
