Porsche Diesel S 309
Built: 1961–1963 · Series: Super
More machines from model year 1961
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
Porsche-Diesel Super (1956–1963) – the three-cylinder from Friedrichshafen: Super 308 to 339, Super L, N, S and Export, the first digit as cylinder count, the last as hp, air-cooled with hydraulic clutch, 22 to 30 kW
The Porsche-Diesel Super is the three-cylinder of the Porsche tractors – the range between the Junior with one, the Standard with two and the Master with four cylinders that Mannesmann built in Friedrichshafen from 1956 after taking over Allgaier's tractor division. The design goes back to Ferdinand Porsche's Volksschlepper: air-cooled modular engines with identical cylinders for all sizes, a hydraulic clutch that allowed starting without a clutch pedal, and the red livery with the Porsche script. The type logic: the first digit gives the cylinder count, the following ones the output in hp – Super 308 about 30 hp, Super 318 about 32 hp in the upgraded form, Super 339 about 38 hp; the letters L, N and S mark versions with long wheelbase, normal layout and narrow track, Export the version for overseas markets, B an equipment variant.
Read on 3 more paragraphs
The register lists 15 versions with 22 to 30 kW (30 to 40 hp), 2,467 to 2,625 cm³ with three cylinders, rated speeds of 2,000 to 2,300 rpm, torque from 136 to 140 Nm, unladen weights from 1,450 to 2,460 kg, lengths from 2,800 to 3,510 mm, widths from 1,150 to 1,871 mm and heights from 1,450 to 1,950 mm – all diesel.
Porsche-Diesel built about 125,000 tractors until 1963, then Renault took over sales and production ended – the Super with the smooth three-cylinder was the best-bought model of the middle class and is today the most sought-after Porsche tractor.
Used Supers are collector pieces with prices that reflect the Porsche name; when buying, originality, the condition of the air-cooled cylinders and blower, the hydraulic clutch, gearbox and sheet metal count; the club scene and remanufacturers secure the parts.
Sources: SpecCodex register, model data: Porsche-Diesel Super, Porsche-Diesel (Wikipedia)
Technical data
Engine
| Fuel | dieselcorrect |
|---|---|
| Power | 40 hp (29.5 kW)correct |
| Rated speed | 2,000 rpmcorrect |
| Torque | 138 Nmcorrect |
| Speed at max. torque | 1,650 rpmcorrect |
| Cylinders | 3correct |
| Displacement | 2,625 cm³correct |
| Bore | 98 mmcorrect |
| Stroke | 116 mmcorrect |
| Cooling | air-cooledcorrect |
Dimensions and weights
| Length | 2,840 mmcorrect |
|---|---|
| Width | 1,170 mmcorrect |
| Height | 1,950 mmcorrect |
| Wheelbase | 1,770 mmcorrect |
| Ground clearance | 360 mmcorrect |
| Unladen weight | 1,450 kgcorrect |
Drivetrain and chassis
| Drive | rear-wheel drivecorrect |
|---|---|
| Gearbox | 5V/1Rcorrect |
| Forward gears | 5correct |
| Front tyres | 5.50-16correct |
| Rear tyres | 11-24correct |
| Top speed | 23.6 km/hcorrect |
Working data
| Fuel tank capacity | 40 lcorrect |
|---|
Origin and approval
| Construction | unit construction (no separate frame)correct |
|---|
Where this model stands
Power-to-weight ratio: 20.3 kW/t (30 kW / 1.4 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 Porsche Diesel S 309 have?
The Porsche Diesel S 309 delivers 40 hp.
How much does the Porsche Diesel S 309 weigh?
The unladen weight is 1,450 kg.
What engine does the Porsche Diesel S 309 have?
3 cylinders, 2,625 cm³ displacement, Diesel.
How fast does the Porsche Diesel S 309 go?
Top speed is 23.6 km/h.
What are the dimensions of the Porsche Diesel S 309?
2,840 mm × 1,170 mm × 1,950 mm.
When was the Porsche Diesel S 309 built?
Production years: 1961–1963.
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 26 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
L 308
N 309
Super 308
Super 309
Super 339
Super B308
Super Export 329
Super Export 339
Super L 318
Super L 319
Super L318
Super L319
Sources: [1]
Tractor in 3D section
Turn the model, look inside and click an assembly — each one is explained.