Ford 7840 (A)
Built: 1991–1998 · Series: 40 er-Baureihe
More machines from model year 1991
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Ford 7840 (A): water-cooled six-cylinder diesel tractor from the 40 series, 6,582 cc, 73.5 kW and 4,240 kg weight, built 1991 to 1998
Ford continued its tractor production in the 1990s at Basildon in England, before the division passed to New Holland. The 7840 (A) from the 40 series was among the larger models of this generation.
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The 7840 (A) is powered by a water-cooled six-cylinder diesel engine of 6,582 cc, producing 100 hp, or 73.5 kW, at 2,070 rpm. At a weight of 4,240 kg, a length of 4,361 mm, a height of 2,776 mm and a width of 2,095 mm, with a wheelbase of 2,690 mm, the machine reaches a top speed of 30 km/h.
A six-cylinder engine of over 6.5 litres and 73.5 kW belongs to a different world of work than smaller three- or four-cylinder tractors: it is built for tillage with larger implements, working with heavy trailers and demanding power-take-off tasks on larger arable areas. The high weight of 4,240 kg additionally provides ground pressure and traction for heavy drawbar work. The power take-off on tractors of this class often runs at 1,000 rpm, so as to also supply power-hungry implements.
When buying a Ford 7840 (A) secondhand, the condition of the clutch and gearbox given the power transmitted, the cooling system of the large six-cylinder engine, and the injection pump and injectors of the diesel engine matter most. Also worth checking are the brakes and the tightness of the hydraulic system for mounted implements.
Sources: SpecCodex-Register: Kennwerte des Modells Ford 7840 (A)
Technical data
Engine
| Fuel | dieselcorrect |
|---|---|
| Power | 100 hp (73.5 kW)correct |
| Rated speed | 2,070 rpmcorrect |
| Cylinders | 6correct |
| Displacement | 6,582 cm³correct |
| Cooling | water-cooledcorrect |
Dimensions and weights
| Length | 4,361 mmcorrect |
|---|---|
| Width | 2,095 mmcorrect |
| Height | 2,776 mmcorrect |
| Wheelbase | 2,690 mmcorrect |
| Ground clearance | 456 mmcorrect |
| Unladen weight | 4,240 kgcorrect |
Drivetrain and chassis
| Drive | rear- or four-wheel drivecorrect |
|---|---|
| Gearbox | 12 V/ 12 R or 16 V/16 Rcorrect |
| Front tyres | 10.0-16 ASF (A: 14.9 R 28 AS)correct |
| Rear tyres | 18.4 R 34 AS (A: 18.4 R 38 AS)correct |
| Top speed | 30 km/hcorrect |
Origin and approval
| Construction | unit construction (no separate frame)correct |
|---|
Where this model stands
Power-to-weight ratio: 17.3 kW/t (74 kW / 4.2 t)
Power class: Universal (40–100 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 Ford 7840 (A) have?
The Ford 7840 (A) delivers 100 hp.
How much does the Ford 7840 (A) weigh?
The unladen weight is 4,240 kg.
What engine does the Ford 7840 (A) have?
6 cylinders, 6,582 cm³ displacement, Diesel.
How fast does the Ford 7840 (A) go?
Top speed is 30 km/h.
What are the dimensions of the Ford 7840 (A)?
4,361 mm × 2,095 mm × 2,776 mm.
When was the Ford 7840 (A) built?
Production years: 1991–1998.
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 19 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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Tractor in 3D section
Turn the model, look inside and click an assembly — each one is explained.