Heinrich Lanz HR 4
Built: 1928–1929 · Series: Kühler-Bulldog
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
Heinrich Lanz Kühler-Bulldog (HR 4): water-cooled multi-fuel single-cylinder tractor with a visible front radiator, 16.1 kW and 3,500 kg from the years 1928 to 1929
Heinrich Lanz of Mannheim initially built its Bulldog tractors without a prominent front radiator; the version designated Kühler-Bulldog, by contrast, has a visible, forward-mounted radiator and was powered by a single-cylinder hot-bulb engine that could run on crude oil, gas oil or paraffin.
Read on 3 more paragraphs
The HR 4 is powered by a water-cooled single-cylinder engine that produces 22 hp, or 16.1 kW, at 500 rpm. At a weight of 3,500 kg, a length of 3,000 mm, a height of 2,170 mm, a width of 1,900 mm and a wheelbase of 1,800 mm, the machine reaches a top speed of 7 km/h.
The ability to switch between crude oil, gas oil and paraffin made operation independent of a single source of supply, an important advantage at a time when fuel supply in rural areas was not guaranteed everywhere. The low speed and large displacement delivered the high torque needed for ploughing and pulling work, at a correspondingly low travel speed. Such an engine ran slowly but steadily, which made precise handling during ploughing easier.
When buying, the condition of the hot bulb and cylinder bore, which were stressed differently by switching fuels, matters, along with the tightness of the visible front radiator and water pump. The gearbox and clutch should be checked for noise; spare parts for this early Bulldog version are now only available through specialist collectors.
Sources: SpecCodex-Register: Kennwerte des Modells Heinrich Lanz HR 4
Technical data
Engine
| Fuel | Rohöl, Gasöl, Petroleumcorrect |
|---|---|
| Power | 22 hp (16.1 kW)correct |
| Rated speed | 500 rpmcorrect |
| Cylinders | 1correct |
| Bore | 225 mmcorrect |
| Stroke | 260 mmcorrect |
| Cooling | water-cooledcorrect |
Dimensions and weights
| Length | 3,000 mmcorrect |
|---|---|
| Width | 1,900 mmcorrect |
| Height | 2,170 mmcorrect |
| Wheelbase | 1,800 mmcorrect |
| Unladen weight | 3,500 kgcorrect |
Drivetrain and chassis
| Drive | rear-wheel drivecorrect |
|---|---|
| Gearbox | 3V/1Rcorrect |
| Top speed | 7 km/hcorrect |
Origin and approval
| Construction | unit construction (no separate frame)correct |
|---|---|
| Units built | 180correct |
Where this model stands
Power-to-weight ratio: 4.6 kW/t (16 kW / 3.5 t)
Power class: Compact (< 40 hp)
Stronger than 9% 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 HR 4 have?
The Heinrich Lanz HR 4 delivers 22 hp.
How much does the Heinrich Lanz HR 4 weigh?
The unladen weight is 3,500 kg.
What engine does the Heinrich Lanz HR 4 have?
1 cylinders, Rohöl, Gasöl, Petroleum.
How fast does the Heinrich Lanz HR 4 go?
Top speed is 7 km/h.
What are the dimensions of the Heinrich Lanz HR 4?
3,000 mm × 1,900 mm × 2,170 mm.
When was the Heinrich Lanz HR 4 built?
Production years: 1928–1929.
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.
Request a quote →
We ask the suppliers and come back with price and lead time.
Request spare parts →
This page carries 18 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.
Missing a figure you were looking for? Report it →
Know this machine better? Have a photo, a manual, or know that a figure is wrong? Add it to the register →
Sources: Wikibooks Traktorenlexikon (CC BY-SA 4.0) (retrieved August 2026) · Values adopted and presented in our own form; changes from the source are possible. · How we check the data
Tractor in 3D section
Turn the model, look inside and click an assembly — each one is explained.
