Production years
1948-1957
Nuffield tractor ยท 1948-1957
Nuffield Universal M4 Tractor
The Nuffield Universal M4 was the first Nuffield tractor, launched at the 1948 Smithfield Show and built at Cowley, Oxford, from 1948 to 1957. Its Morris four-cylinder petrol/TVO engine, with Perkins P4 diesel option, made it a landmark of British postwar mechanisation, delivering about 38 hp at 2,000 rpm.
Engine
Morris four-cylinder petrol/TVO; Perkins P4 diesel option
Power
About 38 hp at 2,000 rpm
Weight
Approx. 1,900 kg
Nuffield Universal M4 specifications
| Production years | 1948-1957 |
|---|---|
| Engine | Morris four-cylinder petrol/TVO; Perkins P4 diesel option |
| Power | About 38 hp at 2,000 rpm |
| Transmission | 5-speed |
| Weight | Approx. 1,900 kg |
| Fuel type | Petrol/TVO (or diesel) |
| Hydraulics | Hydraulic lift with three-point linkage |
| Built at | Cowley, Oxford |
What the Universal M4 is used for
The M4 suited mixed farms needing a capable general-purpose tractor for cultivation, mowing, haulage and three-point-mounted implements. Its 5-speed transmission and hydraulic lift made it a practical step forward for many postwar British farms.
Today, it is valued as a working vintage tractor, restoration project and show exhibit. A sound example can also suit gentle smallholding duties, provided expectations reflect its age and original design.
Why the Nuffield Universal M4 stands out
As the first Nuffield, the M4 has real historical pull for British enthusiasts and is an appealing link to Cowley production. Its petrol/TVO character and optional diesel specification give collectors useful variety. Owner-club knowledge can be valuable, but age-related wear, scarce original details and slower road manners deserve consideration.
Buying a used Nuffield Universal M4
Check the Morris petrol/TVO engine, or Perkins P4 diesel where fitted, for easy starting, smoke, oil-pressure behaviour and obvious leaks. Test the 5-speed gearbox, clutch, brakes and hydraulic lift with an implement if possible. Inspect bonnet, tinwork and chassis for corrosion or poor repairs, and assess tyres, registration, serial details and originality. Have it inspected where uncertain. Confirm figures and originality against TractorData.com and club records; values vary by condition, so check current listings rather than a fixed price.
Nuffield Universal M4 frequently asked questions
How much power does a Nuffield Universal M4 have?
The Universal M4 produces about 38 hp at 2,000 rpm. That was useful general-purpose power for a British postwar tractor, although an individual machine's present performance will depend on condition, tuning and the engine fitted.
Which engines were offered in the M4?
The standard verified specification is a Morris four-cylinder petrol/TVO engine, meaning it could use petrol and tractor vaporising oil. A Perkins P4 diesel was also offered as an option, so confirm the engine in any tractor being viewed.
When and where was the Universal M4 built?
The M4 was built at Cowley, Oxford, from 1948 to 1957. It was Nuffield's first tractor and was launched at the 1948 Smithfield Show, giving it particular importance in the marque's British story.
Specifications are commonly cited figures for general reference; exact figures vary by year and serial number, so confirm against TractorData.com and the machine's records. Used tractor values vary by condition and region. Page updated 19 Sep 2026.