Allgaier P 312
Built: 1953–1954 · Series: AP 25
More machines from model year 1953
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Allgaier P 312 – tractor of the AP 25 range from Uhingen to a Porsche design (1953–1954): air-cooled twin-cylinder petrol engine with 1,820 cm³ displacement, 22.1 kW/30 hp
Allgaier-Werke of Uhingen in Baden-Württemberg built tractors to designs by Ferdinand Porsche from the late 1940s, before production later passed to Porsche-Diesel. The P in the type designation P 312 refers to this Porsche design; the P 312 belonged to the AP 25 range built from 1953 to 1954. The Porsche systems across the Allgaier ranges differed mainly in cylinder count and displacement but remained technically closely related and shared many components.
Read on 3 more paragraphs
The P 312 is powered by an air-cooled twin-cylinder petrol engine with 1,820 cm³ displacement, producing 22.1 kW or 30 hp at 2,000 rpm. The machine is 2,900 mm long, 1,090 mm wide and 1,550 mm high, has a wheelbase of 1,656 mm, an unladen weight of 1,275 kg and reaches 23 km/h.
At 23 km/h, the P 312 falls into driving licence category L. Unusual for a tractor of this period is the petrol engine rather than a diesel; air cooling does away with a radiator and water pump and fits the simple, robust layout of the early Porsche designs. The combination of a petrol engine with air cooling made the P 312 independent of a functioning liquid cooling supply, which also made it practical for use in frosty conditions.
On this tractor, now over seventy years old, check the carburettor and ignition system of the petrol engine, the cylinder's cooling fins for cracks and damage, and the steering and chassis for age-related wear; parts come almost exclusively from suppliers specialising in Porsche-Diesel and Allgaier classics.
Sources: SpecCodex-Register: Kennwerte des Modells Allgaier P 312
Technical data
Engine
| Fuel | petrolcorrect |
|---|---|
| Power | 30 hp (22.1 kW)correct |
| Rated speed | 2,000 rpmcorrect |
| Cylinders | 2correct |
| Displacement | 1,820 cm³correct |
| Bore | 100 mmcorrect |
| Stroke | 116 mmcorrect |
| Cooling | air-cooledcorrect |
Dimensions and weights
| Length | 2,900 mmcorrect |
|---|---|
| Width | 1,090 mmcorrect |
| Height | 1,550 mmcorrect |
| Wheelbase | 1,656 mmcorrect |
| Ground clearance | 350 mmcorrect |
| Unladen weight | 1,275 kgcorrect |
Drivetrain and chassis
| Drive | rear-wheel drivecorrect |
|---|---|
| Gearbox | 5/1correct |
| Forward gears | 5correct |
| Front tyres | 4.5-10correct |
| Rear tyres | 8-24correct |
| Top speed | 23 km/hcorrect |
Working data
| Fuel tank capacity | 25 lcorrect |
|---|
Origin and approval
| Units built | ca. 200correct |
|---|
Where this model stands
Power-to-weight ratio: 17.3 kW/t (22 kW / 1.3 t)
Power class: Compact (< 40 hp)
Stronger than 17% 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 Allgaier P 312 have?
The Allgaier P 312 delivers 30 hp.
How much does the Allgaier P 312 weigh?
The unladen weight is 1,275 kg.
What engine does the Allgaier P 312 have?
2 cylinders, 1,820 cm³ displacement, Benzin.
How fast does the Allgaier P 312 go?
Top speed is 23 km/h.
What are the dimensions of the Allgaier P 312?
2,900 mm × 1,090 mm × 1,550 mm.
When was the Allgaier P 312 built?
Production years: 1953–1954.
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 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 24 individual figures for this model. They come from 2 recorded sources; 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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