Nuffield 4/25 (425)
Built: 11/1968–12/1969 · Series: Other models
More machines from model year 1968
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Nuffield – other models: collective page of the British tractor brand of the Nuffield Organization (renamed Leyland from 1969), Universal range, BMC engines, 11.2 to 48.5 kW, 883 to 2,660 kg unladen weight
This page gathers the Nuffield tractors the register could not assign to a named range. Nuffield was the tractor brand of the British Nuffield Organization, which became one of the major British manufacturers with the Universal range from the 1940s; after the merger that formed the British Motor Corporation (BMC), engines came from BMC itself as well as from Morris/Wolseley and IMR, including the BMC OE4 type. From 1969, as part of the restructuring into British Leyland, the brand was renamed Leyland.
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The register lists here 23 versions with 11.2 to 48.5 kW from three- to four-cylinder engines with 948 to 3,770 cm³ displacement running at 2,000 to 2,500 revolutions per minute and torques of 52 to 230 Nm. Unladen weights range from 883 to 2,660 kg, lengths from 2,490 to 3,275 mm, widths from 1,510 to 2,330 mm and heights from 1,260 to 2,299 mm; PTO output lies between 55 and 60 hp, with a gross vehicle weight of 2,000 kg on record. The register lists diesel, diesel/petrol, petrol and gas/diesel as fuels.
Alongside Fordson and Massey Ferguson, Nuffield was one of the defining British tractor brands of the post-war years and was widespread above all in Britain, Ireland and the Commonwealth. The renaming to Leyland in 1969 marked the end of the brand, though its models are still maintained today on the British vintage-tractor market.
On used examples of these historic tractors, the condition of the engine and cooling system, clutch and gearbox, brakes and steering, and rust on the sheet-metal parts and mudguards all matter; on the petrol and mixed-fuel variants, carburettor condition is an additional check point. Spare parts today run mainly through dealers and clubs specialising in British vintage tractors.
Sources: SpecCodex register, model data: Nuffield (weitere Modelle), Nuffield Organization (Wikipedia)
Technical data
Engine
| Fuel | Diesel/Benzincorrect |
|---|---|
| Power | 25.3 hp (18.6 kW)correct |
| Rated speed | 2,500 rpmcorrect |
| Torque | 69 Nmcorrect |
| Speed at max. torque | 1,400 rpmcorrect |
| Cylinders | 4correct |
| Displacement | 1,488 cm³correct |
| Bore | 72.9 mmcorrect |
| Stroke | 88.9 mmcorrect |
| Compression ratio | 23correct |
| Cooling | water-cooledcorrect |
Dimensions and weights
| Length | 2,780 mmcorrect |
|---|---|
| Width | 1,537 mmcorrect |
| Height | 1,892 mmcorrect |
| Wheelbase | 1,702 mmcorrect |
| Ground clearance | 324 mmcorrect |
| Unladen weight | 1,056 kgcorrect |
Drivetrain and chassis
| Drive | rear-wheel drivecorrect |
|---|---|
| Gearbox | 9 V/3 Rcorrect |
| Front tyres | 5.50-15 ASFcorrect |
| Rear tyres | 12.4-24 AScorrect |
| Top speed | 25 km/hcorrect |
Origin and approval
| Construction | semi-frame constructioncorrect |
|---|
Where this model stands
Power-to-weight ratio: 17.6 kW/t (19 kW / 1.1 t)
Power class: Compact (< 40 hp)
Stronger than 13% 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 Nuffield 4/25 (425) have?
The Nuffield 4/25 (425) delivers 25.3 hp.
How much does the Nuffield 4/25 (425) weigh?
The unladen weight is 1,056 kg.
What engine does the Nuffield 4/25 (425) have?
4 cylinders, 1,488 cm³ displacement, Diesel/Benzin.
How fast does the Nuffield 4/25 (425) go?
Top speed is 25 km/h.
What are the dimensions of the Nuffield 4/25 (425)?
2,780 mm × 1,537 mm × 1,892 mm.
When was the Nuffield 4/25 (425) built?
Production years: 11/1968–12/1969.
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 24 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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