Heinrich Lanz D 6520 (22 kW)
Built: 1931–1935 · Series: HR 5c
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Heinrich Lanz HR 5c (D 6520): water-cooled multi-fuel single-cylinder tractor with 22 kW, 3,380 kg and two rated engine speeds from the years 1931 to 1935
Heinrich Lanz of Mannheim built its Bulldog tractors with single-cylinder hot-bulb engines that, depending on availability, could run on crude oil, benzole or paraffin. In the early 1930s the HR 5c series was one of the manufacturer's mid-range power classes.
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The D 6520 is powered by a water-cooled single-cylinder engine that runs at either 540 or 630 rpm, producing 30 hp, or 22 kW. At a weight of 3,380 kg, a length of 3,130 mm, a height of 1,595 mm, a width of 1,945 mm and a wheelbase of 1,864 mm, the machine reaches a top speed of 16.6 km/h.
The two usable engine speeds allowed a choice between the standardised PTO speed of 540 rpm for driven implements and a higher speed for pure pulling work. A single cylinder of this displacement ran correspondingly slowly but with high torque, typical of the heavy field work of the period. Such a slow-turning single cylinder also ran steadily under partial load for extended ploughing sessions, a common demand in daily farm use.
When buying, the condition of the hot bulb and cylinder bore matters, as these parts were particularly stressed by multi-fuel operation, along with the radiator and water pump for leaks. The gearbox and clutch should be checked for noise and the frame for rust; spare parts for this series are now only available through a specialist circle of collectors.
Sources: SpecCodex-Register: Kennwerte des Modells Heinrich Lanz D 6520
Technical data
Engine
| Fuel | Vielstoffcorrect |
|---|---|
| Power | 30 hp (22 kW)correct |
| Rated speed | 540/630 rpmcorrect |
| Cylinders | 1correct |
| Cooling | water-cooledcorrect |
Dimensions and weights
| Length | 3,130 mmcorrect |
|---|---|
| Width | 1,945 mmcorrect |
| Height | 1,595 mmcorrect |
| Wheelbase | 1,864 mmcorrect |
| Ground clearance | 230 mmcorrect |
| Unladen weight | 3,380 kgcorrect |
Drivetrain and chassis
| Drive | rear-wheel drivecorrect |
|---|---|
| Gearbox | 3V/1Rcorrect |
| Front tyres | 7.00-20correct |
| Rear tyres | 10.50-24correct |
| Top speed | 16.6 km/hcorrect |
Origin and approval
| Construction | unit construction (no separate frame)correct |
|---|
Where this model stands
Power-to-weight ratio: 6.5 kW/t (22 kW / 3.4 t)
Power class: Compact (< 40 hp)
Stronger than 16% 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 D 6520 have?
The Heinrich Lanz D 6520 delivers 30 hp.
How much does the Heinrich Lanz D 6520 weigh?
The unladen weight is 3,380 kg.
What engine does the Heinrich Lanz D 6520 have?
1 cylinders, Vielstoff.
How fast does the Heinrich Lanz D 6520 go?
Top speed is 16.6 km/h.
What are the dimensions of the Heinrich Lanz D 6520?
3,130 mm × 1,945 mm × 1,595 mm.
When was the Heinrich Lanz D 6520 built?
Production years: 1931–1935.
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 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.
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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.
