Heinrich Lanz D 2807
Built: 1954 · Series: Halbdiesel
More machines from model year 1954
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
Lanz Halbdiesel – the last hot-bulb Bulldogs, 1952–1956: single cylinder, two-stroke and the four-digit type number
Halbdiesel ('semi-diesel') is Lanz's name for the Bulldogs of 1952 to 1956 that mark the transition from the classic hot-bulb engine to the full diesel. The engine remained the Mannheim single-cylinder two-stroke with the big horizontal cylinder that had defined the Bulldog since 1921 – now with medium-pressure injection, so that after a short warm-up it ran on diesel fuel and the blowlamp for starting was no longer needed. This made the Halbdiesel among the last tractors of their kind before John Deere, after taking over Lanz in 1956, switched to multi-cylinder full diesels.
Read on 3 more paragraphs
The four-digit type number reads as a combination: the first digits give the power class in hp – 17, 19, 22, 28, 32, 36 – the last ones the version, such as field or road model and gearbox step. In the register the models run from 12.4 to 43.9 kW with 2,256 to 7,372 cm³ of displacement – all with a single cylinder – unladen weight lies between 1,310 and 3,920 kg, top speed between 14.5 and 30.8 km/h.
The huge single cylinders of over seven litres at low revs explain the Bulldog's characteristic slow beat and its pulling power from the bottom of the rev range.
Halbdiesel Bulldogs are sought-after collector pieces today. When buying, the piston and cylinder of the two-stroke, a leak-free crankcase, the radiator and originality count – many machines were kept running for decades with non-original parts.
Sources: SpecCodex register, model data: Heinrich Lanz Halbdiesel, Lanz Bulldog (Wikipedia)
Technical data
Engine
| Fuel | Diesel/Benzincorrect |
|---|---|
| Power | 28 hp (20.5 kW)correct |
| Rated speed | 850 rpmcorrect |
| Cylinders | 1correct |
| Displacement | 3,711 cm³correct |
| Bore | 150 mmcorrect |
| Stroke | 210 mmcorrect |
| Injection pressure | 120 barcorrect |
| Cooling | water-cooledcorrect |
Drivetrain and chassis
| Drive | rear-wheel drivecorrect |
|---|---|
| Gearbox | 6V/2Rcorrect |
| Front tyres | 6.00-20correct |
| Rear tyres | 9-24correct |
| Top speed | 26.5 km/hcorrect |
Origin and approval
| Construction | unit construction (no separate frame)correct |
|---|
Frequently asked questions
How much power does the Heinrich Lanz D 2807 have?
The Heinrich Lanz D 2807 delivers 28 hp.
What engine does the Heinrich Lanz D 2807 have?
1 cylinders, 3,711 cm³ displacement, Diesel/Benzin.
How fast does the Heinrich Lanz D 2807 go?
Top speed is 26.5 km/h.
When was the Heinrich Lanz D 2807 built?
Production years: 1954.
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 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.
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This page carries 16 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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Other models in this series
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Tractor in 3D section
Turn the model, look inside and click an assembly — each one is explained.