Bührer Komfort 6105 (A)
Built: 1975–1978 · Series: RAPID-Baureihe
More machines from model year 1975
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Bührer Rapid and Komfort series (1960s and 1970s) – the tractors from Hinwil in the Zurich Oberland: 455 to 6135, the number as size and power step, A for four-wheel drive, L as version
Bührer of Hinwil in the Zurich Oberland was Switzerland's largest tractor maker: Fritz Bührer built tractors from 1929 for the country's small, sloping farms, and the Rapid and Komfort models of the 1960s and 1970s were the company's last generation before the price pressure of the import brands ended production in 1978. The type logic: the number orders size and power in ascending order – 455 and 465 the mid-range around 55 to 65 hp, 475 and 685 the larger models, 6105 and 6135 the six-cylinders with about 105 and 135 hp – Komfort marks the equipment with driver comfort and cab, A four-wheel drive, L a version variant. The engines were bought-in four- and six-cylinder diesels of 3.3 to 5.7 litres at 2,000 to 2,200 rpm; Bührer's speciality was the many-speed gearbox and the Bührer dual clutch that made the tractors fast runners up to 40 km/h fit for Swiss roads.
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The register lists 7 versions with 40.5 to 99.3 kW from four- and six-cylinders of 3,325 to 5,673 cm³, torque from 206 to 430 Nm, unladen weights from 2,500 to 3,850 kg, lengths from 3,530 to 4,230 mm, widths from 1,780 to 2,100 mm and heights from 1,870 to 2,480 mm.
Bührer tractors are cult objects in Switzerland: they are regarded as robust, road-fast and long-lived, and the Bührer friends keep hundreds in use; the 6135 was the most powerful Swiss production tractor.
On used tractors, originality, engine condition (parts through the engine maker), gearbox and dual clutch (the Bührer speciality), four-wheel drive on A models, brakes and hydraulics count; parts run through Bührer specialists in Switzerland.
Sources: SpecCodex register, model data: Bührer Rapid-Baureihe, Bührer Traktorenfabrik (Wikipedia)
Technical data
Engine
| Fuel | dieselcorrect |
|---|---|
| Power | 105 hp (77.2 kW)correct |
| Rated speed | 2,100 rpmcorrect |
| Torque | 353 Nmcorrect |
| Speed at max. torque | 1,600 rpmcorrect |
| Cylinders | 6correct |
| Displacement | 5,673 cm³correct |
| Bore | 97 mmcorrect |
| Stroke | 128 mmcorrect |
| Compression ratio | 17correct |
| Injection pressure | 177 barcorrect |
| Cooling | water-cooledcorrect |
Dimensions and weights
| Length | 4,070 mmcorrect |
|---|---|
| Width | 2,100 mmcorrect |
| Height | 2,480 mmcorrect |
| Wheelbase | 2,470 mmcorrect |
| Ground clearance | 400 mmcorrect |
| Unladen weight | 3,730 kgcorrect |
Drivetrain and chassis
| Drive | rear- or four-wheel drivecorrect |
|---|---|
| Gearbox | 15 V/3 Rcorrect |
| Front tyres | 10.5-18 ASF (A: 10.5-20 AS)correct |
| Rear tyres | 18.4-34 AScorrect |
| Top speed | 25 km/hcorrect |
Origin and approval
| Construction | combined frame and unit constructioncorrect |
|---|---|
| Units built | 12 (A: 15)correct |
Where this model stands
Power-to-weight ratio: 20.7 kW/t (77 kW / 3.7 t)
Power class: Large (100–180 hp)
Stronger than 69% 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 Komfort 6105 (A) have?
The Bührer Komfort 6105 (A) delivers 105 hp.
How much does the Bührer Komfort 6105 (A) weigh?
The unladen weight is 3,730 kg.
What engine does the Bührer Komfort 6105 (A) have?
6 cylinders, 5,673 cm³ displacement, Diesel.
How fast does the Bührer Komfort 6105 (A) go?
Top speed is 25 km/h.
What are the dimensions of the Bührer Komfort 6105 (A)?
4,070 mm × 2,100 mm × 2,480 mm.
When was the Bührer Komfort 6105 (A) built?
Production years: 1975–1978.
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
Sources: Wikibooks Traktorenlexikon (CC BY-SA 4.0) (retrieved August 2026) · How we check the data
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