MAN D 40 Allrad
Built: 1956–1957 · Series: D
More machines from model year 1956
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MAN D 40 Allrad: agricultural tractor from a manufacturer known chiefly as a maker of trucks and engines, built in 1956 and 1957, water-cooled four-cylinder diesel of 3,473 cm³, 40 hp and four-wheel drive
MAN, the Maschinenfabrik Augsburg-Nürnberg, is known chiefly as a manufacturer of trucks, buses and diesel engines. In the 1950s its programme also included agricultural tractors for a few years under the D series, into which MAN brought its experience in diesel-engine building.
Read on 3 more paragraphs
The D 40 Allrad, built in 1956 and 1957, is powered by a water-cooled four-cylinder diesel engine of 3,473 cm³ displacement, producing 40 hp, equivalent to 29.3 kW, at 1,800 rpm. Gross weight is 2,530 kg and top speed is 18.4 km/h, giving a power-to-weight figure of roughly 63.3 kg per hp. At 3,620 mm long, 1,865 mm wide, 1,930 mm high and with a wheelbase of 2,215 mm, the D 40 is a mid-sized tractor.
At 18.4 km/h the D 40 falls into licence class L. What gives the model its name, and makes it technically notable, is its four-wheel drive, still the exception for tractors of this size in the 1950s, which provides extra traction on loose or difficult ground where a rear-wheel-drive tractor of the same power would reach its limits.
When buying such a rare four-wheel-drive agricultural tractor the front-axle drivetrain is the main focus: transfer gearbox, drive shafts and front-axle bearings are structurally more complex than on a standard tractor and, from a manufacturer that gave up tractor production long ago, hard to replace. The cooling system should also be checked for corrosion, along with the gearbox, clutch and the general rust condition.
Sources: SpecCodex-Register: Kennwerte des Modells D 40 Allrad
Technical data
Engine
| Fuel | dieselcorrect |
|---|---|
| Power | 40 hp (29.3 kW)correct |
| Rated speed | 1,800 rpmcorrect |
| Cylinders | 4correct |
| Displacement | 3,473 cm³correct |
| Bore | 96 mmcorrect |
| Stroke | 120 mmcorrect |
| Injection pressure | 175 barcorrect |
| Cooling | water-cooledcorrect |
Dimensions and weights
| Length | 3,620 mmcorrect |
|---|---|
| Width | 1,865 mmcorrect |
| Height | 1,930 mmcorrect |
| Wheelbase | 2,215 mmcorrect |
| Ground clearance | 400 mmcorrect |
| Unladen weight | 2,530 kgcorrect |
Drivetrain and chassis
| Drive | four-wheel drivecorrect |
|---|---|
| Gearbox | 5V/1Rcorrect |
| Front tyres | 6.50-20 AScorrect |
| Rear tyres | 13-30 AScorrect |
| Top speed | 18.4 km/hcorrect |
Origin and approval
| Construction | frameless unit constructioncorrect |
|---|---|
| Units built | 875 mit 4 R 1correct |
Where this model stands
Power-to-weight ratio: 11.6 kW/t (29 kW / 2.5 t)
Power class: Compact (< 40 hp)
Stronger than 25% 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 MAN D 40 Allrad have?
The MAN D 40 Allrad delivers 40 hp.
How much does the MAN D 40 Allrad weigh?
The unladen weight is 2,530 kg.
What engine does the MAN D 40 Allrad have?
4 cylinders, 3,473 cm³ displacement, Diesel.
How fast does the MAN D 40 Allrad go?
Top speed is 18.4 km/h.
What are the dimensions of the MAN D 40 Allrad?
3,620 mm × 1,865 mm × 1,930 mm.
When was the MAN D 40 Allrad built?
Production years: 1956–1957.
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.
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This page carries 23 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.
