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Bührer 445P

Built: 1977 · Series: 4

More machines from model year 1977

Source: https://commons.wikimedia.org/wiki/File:B%C3%BChrer_Spezial_

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The Bührer 445P belongs to the 4 series. Production: 1977. The engine delivers 45 hp, has 3 cylinders, with a displacement of 2,502 cm³. The unladen weight is 1,920 kg. Top speed is 25 km/h. Transmission: 10/2. The engine is water-cooled. The fuel is diesel. The gearbox offers 10 forward gears. There are also 2 reverse gears. Around 50 units were built. Rated output across the Bührer range ranges from 30 to 135 hp; the 445P sits at the bottom of that range with 45 hp. Its immediate neighbours are the MFD 4/10 below it with 40 hp and the OP-17 STANDARD (A) above it with 46 hp. Rated output across the Bührer range ranges from 30 to 135 hp; here the 445P sits at the bottom of that range with 45 hp. 21 Bührer models across 12 series are on record.

Bührer 445P: Swiss three-cylinder diesel of the 4 range, 45 hp, 1,920 kg unladen weight, small run of about 50 units, built 1977

Bührer, a Swiss tractor maker based in Hinwil in the canton of Zurich, built field tractors for the country's farms from the 1930s into the late 1970s, competing with brands such as Hürlimann and Meili. About 50 examples of the 445P in the 4 range were built in 1977, one of the later and smaller-volume models of the marque.

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The 445P carries a water-cooled three-cylinder diesel engine of 2,502 cm³ displacement producing 45 hp, and a 10/2 gearbox with ten forward and two reverse gears. With an unladen weight of 1,920 kg, it reaches a top speed of 25 km/h – a ratio of engine size to weight typical of the mid class among Bührer's ranges.

At 25 km/h the 445P falls within driving licence category L up to 40 km/h. A three-cylinder of this displacement belonged in the 1970s to the upper mid class of field tractors for tillage and transport on smaller to medium Swiss farms; the multi-step ten-speed gearbox allowed finer matching of travel speed to draft work and road transport rather than relying on engine speed alone.

When buying such a rare model second-hand, the operating hours and the condition of the injection pump, wear on the clutch and ten-speed gearbox, and rust on the chassis and sheet-metal parts matter most. Because only around 50 examples were built, spare parts are practically only obtainable through specialist collectors of historic Swiss tractors, and patience is often needed before a matching part turns up.

Sources: SpecCodex-Register: Kennwerte des Modells Bührer 445P

Technical data

Engine

Fuel	dieselcorrect
Power	45 hpcorrect
Power	45 hpcorrect
Cylinders	3correct
Displacement	2,502 cm³correct
Cooling	water-cooledcorrect

Dimensions and weights

Unladen weight	1,920 kgcorrect

Drivetrain and chassis

Gearbox	10/2correct
Forward gears	10correct
Reverse gears	2correct
Top speed	25 km/hcorrect

Origin and approval

Units built	50correct

Where this model stands

Power-to-weight ratio: 17.2 kW/t (33 kW / 1.9 t)

Power class: Universal (40–100 hp)

Stronger than 29% 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 Bührer 445P have?

The Bührer 445P delivers 45 hp.

How much does the Bührer 445P weigh?

The unladen weight is 1,920 kg.

What engine does the Bührer 445P have?

3 cylinders, 2,502 cm³ displacement, Diesel.

How fast does the Bührer 445P go?

Top speed is 25 km/h.

When was the Bührer 445P built?

Production years: 1977.

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 12 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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