Normag Zorge NG 28
Built: 1953–1957 · Series: Faktor III
More machines from model year 1953
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Normag Zorge Faktor III (NG 28): twin-cylinder diesel tractor with 20.5 kW output, built between 1953 and 1957 in the Harz
With the Faktor III, Normag Zorge in the Harz extended the Faktor line upward, offering a more powerful twin-cylinder tractor for medium agricultural holdings.
Read on 3 more paragraphs
The NG 28 is powered by a twin-cylinder diesel engine of 2.58 litres with water thermosiphon cooling, delivering 20.5 kW at 1,500 rpm, roughly 28 hp. At an unladen weight of 1,515 kg, a length of 2,670 mm, a height of 1,580 mm and a wheelbase of 1,705 mm, the machine has a design top speed of 18.7 km/h.
Water thermosiphon cooling follows the classic pump-free circulation principle and was widespread on twin-cylinder diesels of the post-war years. At just over 1.5 tonnes unladen and with 20.5 kW on tap, the NG 28 sat in a class that allowed both tillage and heavier transport on medium holdings, going beyond the smaller Faktor II with larger power-take-off implements.
When buying a tractor like this, check the cooling lines and cylinder head gasket, since thermosiphon systems overheat quickly once they start leaking. Wear on clutch, gearbox, axle bearings and rear axle seals should also be assessed before purchase. The condition of the fuel tank and its mounting straps is also worth a look, along with wear on the rear wheel bearings after so many decades of use. Original Normag parts are scarce today, so compatible aftermarket components are often the more realistic option for a running restoration.
Sources: SpecCodex-Register: Kennwerte des Modells Normag Zorge Faktor III (NG 28), Normag (Wikipedia)
Technical data
Engine
| Fuel | dieselcorrect |
|---|---|
| Power | 28 hp (20.5 kW)correct |
| Rated speed | 1,500 rpmcorrect |
| Cylinders | 2correct |
| Displacement | 2,580 cm³correct |
| Bore | 105 mmcorrect |
| Stroke | 150 mmcorrect |
| Injection pressure | 100 barcorrect |
| Cooling | water-cooledcorrect |
Dimensions and weights
| Length | 2,670 mmcorrect |
|---|---|
| Width | 1,570 mmcorrect |
| Height | 1,580 mmcorrect |
| Wheelbase | 1,705 mmcorrect |
| Ground clearance | 425 mmcorrect |
| Unladen weight | 1,515 kgcorrect |
Drivetrain and chassis
| Drive | rear-wheel drivecorrect |
|---|---|
| Gearbox | 8V/2Rcorrect |
| Front tyres | 5.50-16correct |
| Rear tyres | 10-28correct |
| Top speed | 18.7 km/hcorrect |
Origin and approval
| Construction | unit construction (no separate frame)correct |
|---|
Where this model stands
Power-to-weight ratio: 13.5 kW/t (20 kW / 1.5 t)
Power class: Compact (< 40 hp)
Stronger than 15% 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 Normag Zorge NG 28 have?
The Normag Zorge NG 28 delivers 28 hp.
How much does the Normag Zorge NG 28 weigh?
The unladen weight is 1,515 kg.
What engine does the Normag Zorge NG 28 have?
2 cylinders, 2,580 cm³ displacement, Diesel.
How fast does the Normag Zorge NG 28 go?
Top speed is 18.7 km/h.
What are the dimensions of the Normag Zorge NG 28?
2,670 mm × 1,570 mm × 1,580 mm.
When was the Normag Zorge NG 28 built?
Production years: 1953–1957.
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 22 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.
