Fortschritt ZT320
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The ZT320 is a tractor from the manufacturer Fortschritt, classified in the tractor group. It is equipped with a four‑cylinder engine with a displacement of 6,560 cm³ delivering a power output of 100 PS (73.6 kW). The machine measures 4,650 mm in length, 2,120 mm in width and 2,860 mm in height, with a wheelbase of 2,800 mm. Its curb weight is 5,020 kg, the transmission provides twelve forward and eight reverse gears, and the maximum speed is 31 km/h.
A power of 100 PS enables the pulling of heavy agricultural implements and handling of demanding field tasks, while the relatively compact dimensions make the tractor suitable for operation in confined spaces. The weight of 5,020 kg ensures sufficient ground pressure for traction on loose soils, and the 12‑step forward gearbox allows fine speed adjustment to match various working conditions. With a top speed of 31 km/h the ZT320 can also be used for short transport runs between fields.
Given its size and power, the ZT320 is typically employed for medium‑scale field operations such as plowing, seeding and harvesting, as well as for moving harvested material around the farm. The combination of adequate pulling capacity and compact dimensions makes it a fitting choice for farms that require both field work capability and internal material transport.
Fortschritt ZT303: water-cooled diesel tractor producing 90 hp, or 67 kW, from East German production, series production started in 1971
Fortschritt was the name of an agricultural-machinery combine in East Germany with several works, in which the ZT tractor series was also built. The ZT303 entered series production in 1971 and was built in East German factories.
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The ZT303 is powered by a water-cooled diesel engine producing 90 hp, or 67 kW. This makes the machine one of the more powerful tractors in East German agricultural machinery of its time, built for farms with greater power needs.
A diesel tractor of this power class was built for primary tillage with a plough and cultivator on the larger agricultural areas farmed by East Germany's agricultural production cooperatives, as well as for driving harvesting machinery through the power take-off and for heavy trailer work. At around 67 kW, the machine clearly exceeds the power range of the smaller yard tractors of the same period, placing it among the larger field tractors built for cooperative-scale farming.
When buying such an old Fortschritt tractor secondhand, the condition of the diesel engine's injection pump and injectors, and the cooling system given the machine's age, matter most. Also worth checking are wear in the clutch and gearbox, the brakes, and visible corrosion on sheet-metal and frame parts; spare parts for this type of East German agricultural machinery are now only available through specialist suppliers.
Sources: SpecCodex-Register: Kennwerte des Modells Fortschritt ZT303
Technical data
Engine
| Power | 100 hp (73.6 kW)correct |
|---|---|
| Cylinders | 4correct |
| Displacement | 6,560 cm³correct |
Dimensions and weights
| Length | 4,650 mmcorrect |
|---|---|
| Width | 2,120 mmcorrect |
| Height | 2,860 mmcorrect |
| Wheelbase | 2,800 mmcorrect |
| Unladen weight | 5,020 kgcorrect |
Drivetrain and chassis
| Gearbox | 12V / 8Rcorrect |
|---|---|
| Top speed | 31 km/hcorrect |
Where this model stands
Power-to-weight ratio: 14.7 kW/t (74 kW / 5 t)
Power class: Large (100–180 hp)
Stronger than 66% 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 Fortschritt ZT320 have?
The Fortschritt ZT320 delivers 100 hp.
How much does the Fortschritt ZT320 weigh?
The unladen weight is 5,020 kg.
What engine does the Fortschritt ZT320 have?
4 cylinders, 6,560 cm³ displacement.
How fast does the Fortschritt ZT320 go?
Top speed is 31 km/h.
What are the dimensions of the Fortschritt ZT320?
4,650 mm × 2,120 mm × 2,860 mm.
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.
- 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 11 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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Other models in this series
Sources: Wikipedia (retrieved August 2026) · Wikibooks Traktorenlexikon (CC BY-SA 4.0) (retrieved September 2026) · How we check the data
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