Deutz-Fahr M640
Series: Other models
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The M640 is a tractor from the Tractors group manufactured by Deutz‑Fahr. It is equipped with a six‑cylinder engine with a displacement of 6,057 cm³ and a maximum torque of 795 Nm. The transmission is offered as 40V/40R, the fuel tank holds 305 l and the curb weight is 5,970 kg. Dimensions are 4,757 mm in length, 2,550 mm in width and 2,995 mm in height with a wheelbase of 2,767 mm.
A torque of 795 Nm enables pulling heavy implements and handling steep terrain, while the six‑cylinder layout provides smooth power delivery. The curb weight of 5,970 kg reduces ground pressure and improves traction, which is important for field work. The large 305 l tank allows long operating periods without frequent refuelling, beneficial on extensive fields. The 40‑gear transmission offers fine speed steps for precise operation and optimal adaptation to varying working conditions.
The M640 is suited for typical tasks of tractors of this size, such as pulling heavy attachments, working large arable areas and transporting heavy loads. Its robust construction and high lift category (Cat II/III) make it appropriate for demanding field operations and the use of heavy mounted equipment.
Deutz-Fahr – other models: the collective page of tractors outside the named ranges, from the MK3-generation classics through the 4 and 5 series to models with KEYLINE and TTV specification
This page gathers the Deutz-Fahr tractors the register could not assign to a named range – from older model years such as the 100 to 260 MK3 range through the four-cylinder 4 series (4.5, 4.56, 4.85, 4006) to the broad mid-range 5 series with types from 5060 to 5120. Deutz, founded in 1864 by Nikolaus Otto in Cologne as an engine works, merged its tractor business with that of the Fahr machinery works of Gottmadingen in 1968 to form Deutz-Fahr; since 1995 the brand has belonged to the Italian SAME-Deutz-Fahr group (SDF), which builds the tractors in Lauingen on the Danube in Bavaria. In the 5 series the type designation clearly tracks the power: the 5090 has about 90 hp, the 5105 about 105 hp, the 5115 about 115 hp; the suffixes KEYLINE, ECOLINE and TTV denote the equipment level and stepless transmission, D and DT four-wheel drive.
Read on 3 more paragraphs
The register lists here 213 versions with 35 to 211.1 kW (47 to 268 hp) from three- to six-cylinders of 1,758 to 7,146 cm³, unladen weights from 2,800 to 10,725 kg, gross weights from 4,500 to 16,000 kg, lengths from 2,980 to 5,820 mm, widths from 2,008 to 2,944 mm and heights from 2,020 to 3,225 mm.
Deutz-Fahr is one of Europe's longest-established tractor brands and a fixture in the mid and upper power segment in Germany, Italy and much of southern Europe; the brand's distinctive green paint and cab design have shaped its image for decades.
On used tractors, engine condition and rust on the bodywork count on the older MK3 and 4-series models, on the 5 series the transmission (mechanical, KEYLINE or stepless TTV), hydraulics and electronics, and on the DF and G variants the condition of the four-wheel-drive clutch; parts run through the SDF network and in part through Same and Lamborghini workshops.
Sources: SpecCodex register, model data: Deutz-Fahr (weitere Modelle), Deutz-Fahr (SDF, Hersteller)
Technical data
Engine
| Torque | 795 Nmcorrect |
|---|---|
| Cylinders | 6correct |
| Displacement | 6,057 cm³correct |
Dimensions and weights
| Length | 4,757 mmcorrect |
|---|---|
| Width | 2,550 mmcorrect |
| Height | 2,995 mmcorrect |
| Wheelbase | 2,767 mmcorrect |
| Unladen weight | 5,970 kgcorrect |
Drivetrain and chassis
| Gearbox | 40V / 40Rcorrect |
|---|
Working data
| Fuel tank capacity | 305 lcorrect |
|---|
Other data
| Linkage category | Cat II/IIIcorrect |
|---|
Frequently asked questions
How much does the Deutz-Fahr M640 weigh?
The unladen weight is 5,970 kg.
What engine does the Deutz-Fahr M640 have?
6 cylinders, 6,057 cm³ displacement.
What are the dimensions of the Deutz-Fahr M640?
4,757 mm × 2,550 mm × 2,995 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: Latvian open data portal (retrieved August 2026) · Wikibooks Traktorenlexikon (CC BY-SA 4.0) (retrieved September 2026) · Values adopted and presented in our own form; changes from the source are possible. · How we check the data
Tractor in 3D section
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