Introduction
Nuffield 4/25 Agricultural Tractor
The Nuffield 4/25 is a two-wheel drive agricultural tractor produced between 1967 and 1969. Part of the Mini 9/16 series, this machine was designed for light to medium-duty agricultural and utility operations.
Engine and Performance
The tractor is powered by a liquid-cooled, 4-cylinder BMC diesel engine. With a displacement of 1.5 liters (91.5 cubic inches), it delivers a rated power of 25 horsepower (18.6 kW) at 2500 engine RPM. The engine intake system utilizes an oil bath air cleaner to ensure durability in dusty field environments.
Transmission and Drivetrain
The powertrain features a gear-type transmission providing 9 forward speeds and 3 reverse speeds. Power is transferred via a 228.6mm dry disc clutch. The tractor utilizes spur gear final drives and includes a mechanical rear differential lock to improve traction in uneven terrain.
Hydraulics and PTO
The Nuffield 4/25 is equipped with an independent rear power take-off (PTO) capable of operating at both 540 and 1000 RPM, allowing for compatibility with a variety of implements. The rear hitch is a Type I configuration with a lifting capacity of 1000 lbs (453 kg).
Mechanical and Operator Station
The tractor features manual steering and dry disc brakes. It is configured with an open operator station providing visibility for the driver. The vehicle sits on 5.50-16 front agricultural tires and 11.00-24 rear agricultural tires.
Conclusion
The Nuffield 4/25 serves as a reliable, compact utility tractor suitable for small-scale farming, orchard maintenance, or general property upkeep. Its mechanical simplicity and standard PTO options make it a practical choice for enthusiasts and operators requiring a straightforward, legacy workhorse.
Production Information of Nuffield, 4/25
| Manufacturer | Nuffield |
|---|
Dimension and Tires Information of Nuffield, 4/25
| Ag front | 5.50-16 |
|---|---|
| Ag rear | 11.00-24 |
Engine Specifications of Nuffield, 4/25
- BMC
- Liquid-cooled
- Diesel
- 4-cylinder
| Power | 25 hp [18.6 kW] |
|---|---|
| Displacement | 91.5 ci [1.5 L] |
| Air cleaner | Oil bath |
| Bore/Stroke | 2.87x3.50 inches [73 x 89 mm] |
| Rated RPM | 2500 |
Transmission Information of Nuffield, 4/25
Transmission variants 1
| Type | Gear |
|---|---|
| Gears | 9 forward and 3 reverse |
| Clutch | 228.6mm dry disc |
Mechanical Specs of Nuffield, 4/25
- Two-wheel drive
- Dry disc brakes
- Manual steering
- Open operator station.
| Final drives | Spur gear |
|---|---|
| Differential lock | Mechanical rear |
Power Information of Nuffield, 4/25
| Rear PTO | Independent |
|---|---|
| Rear PTO Type | 540/1000 |
Three-Point Hitch of Nuffield, 4/25
| Rear Type | I |
|---|---|
| Rear lift | 1000 lbs [453 kg] |
Where it sits
With 25 HP, the Nuffield 4/25 sits just above Mini 9/16 (16 HP) in Nuffield's range. Its power puts it in the 13th percentile of 1960s models in our database (709 machines).
Frequently asked questions
How much horsepower does the Nuffield 4/25 have?
The Nuffield 4/25 delivers 25 HP.
What years was the Nuffield 4/25 produced?
The Nuffield 4/25 was produced in 1967-1969.
What engine does the Nuffield 4/25 have?
The Nuffield 4/25 is powered by a Diesel, 4-cylinder engine.
What transmission does the Nuffield 4/25 use?
The Nuffield 4/25 uses a Gear transmission.
Is the Nuffield 4/25 4WD?
The Nuffield 4/25 is available in 2WD.