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Zetor 92 er-Serie (UR-1)

5 models in this series

The 92 er-Serie (UR-1) series from Zetor comprises 5 models. Rated output ranges from 51 to 81 hp.

Zetor 92 series (UR I) – five Czechoslovak tractors from the 1980s, 3320/3340 to 7320/7340: 37.5 to 59.6 kW (51 to 81 hp), three- and four-cylinder diesels, 2,880 to 3,200 kg

Zetor 3320/3340
Pictured: Zetor 3320/3340

The Unified Range I (UR I) was the Czechoslovak brand's standard range, built in the 1980s at the then Zetor plant in Brno, and it is also where the types gathered here, 3320/3340, 4320/4340, 5320/5340, 6320/6340 and 7320/7340, come from. The first digit of the type designation orders the size in ascending order, while the four-digit pairs denote closely related versions of the same base types. The engines are three- and four-cylinder diesels.

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The register lists here 5 versions with 37.5 to 59.6 kW (51 to 81 hp) from three- and four-cylinder engines of 2,696 to 3,922 cm³ and torque from 158 to 281 Nm at a rated speed of 2,200 rpm. Unladen weights range from 2,880 to 3,200 kg, length from 3,605 to 3,755 mm, width from 1,800 to 1,875 mm and height from 2,615 to 2,675 mm.

For decades the UR I range was the backbone of agriculture across the former Eastern Bloc and was also exported in large numbers to Western markets, where its low price and simple, repair-friendly technology found buyers. Its rugged mechanics without elaborate electronics also made the range attractive for self-service workshops.

Buying used Zetor UR I models calls for checking the clutch and gearbox, the tightness of the hydraulics and corrosion on the wings and cab after decades of service. Thanks to the large numbers built and the simple construction, parts remain well available today through Zetor specialists and aftermarket suppliers.

Sources: SpecCodex register, model data: Zetor 92er-Serie (UR I), Zetor (manufacturer)

Models compared

5 of 5 models.

3320/33401993–1997 4320/43401993–1997 5320/53401993–1997 6320/63401993–2007 7320/73401995–1997
Power 37.5 kW 44.9 kW 53 kW 53.7 kW 59.6 kW
Rated speed 2,200 rpm 2,200 rpm 2,200 rpm 2,200 rpm 2,200 rpm
PTO speed 540/1000 rpm 540/1000 rpm 540/1000 rpm 540/1000 rpm 540/1000 rpm
Linkage category Cat II Cat II Cat II Cat II Cat II
Cylinders 3 4 4 4 4
Displacement 2,696 cm³ 3,456 cm³ 3,595 cm³ 3,922 cm³ 3,922 cm³
Torque 158 Nm 201 Nm 225 Nm 247 Nm 281 Nm
Fuel tank capacity 55 l 70 l 70 l 70 l 70 l
Top speed 25 km/h 25 km/h 25 km/h 25 km/h 25 km/h
Wheelbase 2,114 mm 2,257 mm 2,257 mm 2,257 mm 2,257 mm
Length 3,640 mm 3,630 mm 3,755 mm 3,605 mm 3,755 mm
Width 1,800 mm 1,854 mm 1,875 mm 1,854 mm 1,875 mm
Height 2,615 mm 2,632 mm 2,665 mm 2,675 mm 2,665 mm
Unladen weight 2,895 kg 2,880 kg 2,925 kg 3,025 kg 3,200 kg

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