Lanz 12/20 HN Verkehr
Built: 1932–1933 · Series: HN 1
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Lanz HN 1 – the 12/20 HN Verkehr: a multi-fuel single-cylinder engine producing 8.8 kW, with 4,767 cm3 displacement and a 3,250 kg weight from the early 1930s
Lanz, in full Heinrich Lanz AG, was based in Mannheim. The double figure "12/20" in the type designation of the HN Verkehr follows the notation common in pre-war Germany that combined taxable and actual power: the first figure names the lower, tax-rated output, the second the engine's real output.
Read on 3 more paragraphs
The 12/20 HN Verkehr carries a thermosyphon-cooled single-cylinder engine of 4,767 cm3 displacement, running on multiple fuels, producing 8.8 kW, or 12 hp, at 760 rpm. The machine weighs 3,250 kg and measures 2,875 mm in length, 1,630 mm in width and 2,300 mm in height.
Multi-fuel capability allowed the engine to run on a range of fuels, including lower-grade ones, and was a key selling point for Lanz engines of this era against pure diesel units. The name suffix "Verkehr" points to a version set up for road use, as distinct from a pure field version. Thermosyphon cooling dispenses with a water pump and relies solely on the natural circulation of heated coolant.
When buying such an old multi-fuel single-cylinder engine, the condition of the pre-combustion chamber and ignition arrangement matters most, since matching spare parts are barely available new any more. The thermosyphon cooling needs an undisturbed, deposit-free circuit, and the flywheel, clutch and frame should be checked for cracks after up to a century of possible use.
Sources: SpecCodex-Register: Kennwerte des Modells 12/20 HN Verkehr
Technical data
Engine
| Fuel | Vielstoffcorrect |
|---|---|
| Power | 12 hp (8.8 kW)correct |
| Rated speed | 760 rpmcorrect |
| Cylinders | 1correct |
| Displacement | 4,767 cm³correct |
| Cooling | Thermosyphonkühlungcorrect |
Dimensions and weights
| Length | 2,875 mmcorrect |
|---|---|
| Width | 1,630 mmcorrect |
| Height | 2,300 mmcorrect |
| Wheelbase | 1,647 mmcorrect |
| Ground clearance | 255 mmcorrect |
| Unladen weight | 3,250 kgcorrect |
Drivetrain and chassis
| Drive | rear-wheel drivecorrect |
|---|---|
| Gearbox | 6V/2Rcorrect |
| Front tyres | 770 x 120correct |
| Rear tyres | 2X 1.060 x 170correct |
| Top speed | 150 km/hcorrect |
Origin and approval
| Construction | frameless unit constructioncorrect |
|---|
Where this model stands
Power-to-weight ratio: 2.7 kW/t (9 kW / 3.2 t)
Power class: Compact (< 40 hp)
Stronger than 2% 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 Lanz 12/20 HN Verkehr have?
The Lanz 12/20 HN Verkehr delivers 12 hp.
How much does the Lanz 12/20 HN Verkehr weigh?
The unladen weight is 3,250 kg.
What engine does the Lanz 12/20 HN Verkehr have?
1 cylinders, 4,767 cm³ displacement, Vielstoff.
How fast does the Lanz 12/20 HN Verkehr go?
Top speed is 150 km/h.
What are the dimensions of the Lanz 12/20 HN Verkehr?
2,875 mm × 1,630 mm × 2,300 mm.
When was the Lanz 12/20 HN Verkehr built?
Production years: 1932–1933.
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 19 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.
