Manufacture D'armes De Paris DR 3
Built: 1947–1951 · Series: DR
More machines from model year 1947
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Manufacture d'Armes de Paris DR 3 (DR series): water-cooled two-cylinder opposed-piston diesel engine of 2,500 cc, rated at 30 hp (22 kW) at 1,500 rpm, a French post-war agricultural tractor built between 1947 and 1951
The name Manufacture d'Armes de Paris, literally Paris arms manufactory, points to an origin in arms production, as seen at several French metalworking firms that switched to agricultural machinery after the Second World War. The DR 3 was built during this period of transition, between 1947 and 1951.
Read on 3 more paragraphs
The DR 3 is driven by a water-cooled two-cylinder opposed-piston diesel engine of 2,500 cc displacement, rated at 30 hp (22 kW) at 1,500 rpm. Unladen weight is 2,200 kg, wheelbase 1,830 mm, width 1,720 mm and length 3,000 mm, at a height of 1,850 mm. Top speed is 20 km/h.
The opposed-piston design, in which two pistons move towards each other within each cylinder, was a rare arrangement of the period aimed at smoother running at low revs. At 30 hp and only 1,500 rpm, with a weight of over 2.2 tonnes, the DR 3 sits in the class of medium tractors of the early post-war years, needed for tillage and drawbar work on farms under reconstruction.
On a surviving DR 3, it is especially worth checking the opposed-piston mechanism for piston timing and even wear of both pistons in each cylinder, since this design is more sensitive to incorrect adjustment than a conventional two-cylinder engine. Parts for this rare powerplant can only be found through collectors and restorers specialising in historic French farm machinery.
Sources: SpecCodex-Register: Kennwerte des Modells Manufacture d'Armes de Paris DR 3
Technical data
Engine
| Fuel | dieselcorrect |
|---|---|
| Power | 30 hp (22 kW)correct |
| Rated speed | 1,500 rpmcorrect |
| Cylinders | 2correct |
| Displacement | 2,500 cm³correct |
| Cooling | water-cooledcorrect |
Dimensions and weights
| Length | 3,000 mmcorrect |
|---|---|
| Width | 1,720 mmcorrect |
| Height | 1,850 mmcorrect |
| Wheelbase | 1,830 mmcorrect |
| Unladen weight | 2,200 kgcorrect |
Drivetrain and chassis
| Drive | rear-wheel drivecorrect |
|---|---|
| Gearbox | 5V+Rcorrect |
| Front tyres | 6 x 19correct |
| Rear tyres | 11, 25 x 24correct |
| Top speed | 20 km/hcorrect |
Origin and approval
| Construction | frameless unit constructioncorrect |
|---|
Where this model stands
Power-to-weight ratio: 10 kW/t (22 kW / 2.2 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 Manufacture D'armes De Paris DR 3 have?
The Manufacture D'armes De Paris DR 3 delivers 30 hp.
How much does the Manufacture D'armes De Paris DR 3 weigh?
The unladen weight is 2,200 kg.
What engine does the Manufacture D'armes De Paris DR 3 have?
2 cylinders, 2,500 cm³ displacement, Diesel.
How fast does the Manufacture D'armes De Paris DR 3 go?
Top speed is 20 km/h.
What are the dimensions of the Manufacture D'armes De Paris DR 3?
3,000 mm × 1,720 mm × 1,850 mm.
When was the Manufacture D'armes De Paris DR 3 built?
Production years: 1947–1951.
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 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.
