Nuffield 4/25
The Nuffield 4/25 is a tractor produced by Nuffield. It is equipped with a 91.5 ci 1.5 L engine. The listed engine power is Diesel (listed): 25 hp / 18.6 kW. Transmission: 9 forward and 3 reverse.
Engine Power
Diesel (listed): 25 hp / 18.6 kW
Fuel & Capacities
Diesel
Transmission
9 forward and 3 reverse
Overview
 | 1967 - 1969 |
|---|
Production | |
|---|---|
Manufacturer | Nuffield |
Nuffield 4/25 Engine | |
|---|---|
BMC 1.5L 4-cyl diesel | |
Engine details ...  |
Nuffield 4/25 Transmission | |
|---|---|
9-speed gear | |
Transmission details ...  |
Nuffield 4/25 Power | |
|---|---|
Engine | 25 hp
18.6 kW |
Mechanical | |
|---|---|
Two-wheel drive | |
Final drives | spur gear |
Differential lock | mechanical rear |
Manual steering | |
Dry disc brakes | |
Open operator station. | |
Tractor hitch | |
|---|---|
Rear Type | I |
Rear lift | 1000 lbs
453 kg |
Power Take-off (PTO) | |
|---|---|
Rear PTO | independent |
Rear PTO Type | 540/1000 |
Dimensions & Tires | |
|---|---|
Front tire | 5.50-16 |
Rear tire | 11.00-24 |
Full dimensions and tires ...  | |
Engine
Engine Detail — 91.5 ci / 1.5 L Diesel
Manufacturer | BMC |
Fuel Type | Diesel |
Configuration | 4-cylinder, liquid-cooled |
Displacement | 91.5 ci
1.5 L |
Bore/Stroke | 2.87x3.50 inches
73 x 89 mm |
Power | 25 hp
18.6 kW |
Air cleaner | oil bath |
Rated RPM | 2500 |
Transmission
Transmission — 9 forward and 3 reverse gear
Type | gear |
Gears | 9 forward and 3 reverse |
Clutch | 228.6mm dry disc |
Dimensions
Nuffield 4/25 Tires | |
|---|---|
Ag front | 5.50-16 |
Ag rear | 11.00-24 |
Dimensions |
|---|
Photos
Nuffield 4/25
Nuffield 4/25
Nuffield 4/25
Recommended Implements & Sizing Guide
Engineering recommendations for Nuffield 4/25 based on its 25 HP power envelope and ASAE agricultural standards.
| Implement & Operation | Recommended Size | Workload Rating | Engineering Notes |
|---|---|---|---|
Moldboard PlowPrimary Tillage | 1 to 2 Bottom (12")1 - 2 铧 (30 cm) | Light Duty | Ideal for garden plots and light sandy soil. |
Rotary Cutter / MowerMowing & Clearing | 5 ft (60 in)1.5 m | Medium Duty | Pasture maintenance and weeds up to 1.5" diameter. |
Rotary TillerSeedbed Prep | 54 to 60 in135 - 150 cm | Medium Duty | Thorough seedbed preparation in orchards and vegetable plots. |
Disc HarrowSecondary Tillage | 5 to 6 ft (16-18" discs)1.5 - 1.8 m (40-45 cm 耙片) | Light Duty | Small acreage soil break-up and secondary aeration. |
Sizing & Soil Condition NoteActual implement sizing varies depending on local soil conditions (heavy clay vs sandy loam), field slope, and operating speed. Heavy tillage implements may require front ballast weights and wheel weights.
Fluids, Capacities & Working Autonomy
Standard fluid requirements, service intervals, and continuous runtime estimates for Nuffield 4/25.
Engine Crankcase Oil
SAE 15W-40 (Heavy Duty Diesel)
Standard Spec: API CK-4 / CJ-4 Heavy Duty
Service Interval: 150 – 250 Hours
Transmission & Hydraulic System
UTTO (Universal Tractor Transmission Oil)
Standard Spec: ISO VG 46 / 68 (Wet Brake & Trans Compatible)
Service Interval: 600 – 1000 Hours
Engine Cooling System
50/50 Ethylene Glycol Pre-mix
Standard Spec: ASTM D6210 / Heavy-Duty OAT Antifreeze
Service Interval: 2 Years / 1500 Hours
Nuffield 4/25 Specification Unit Converter
Convert power, fluid capacities, and operating weights between metric and imperial standards for Nuffield 4/25.
Converted Equivalents:
Horsepower (HP)25 hp
Kilowatts (kW)18.6 kW
Metric Horsepower (PS / CV)25.3 PS
Direct Competitor Comparison
Compare Nuffield 4/25 against same-era industry alternatives in the same horsepower class.
Current Model
Nuffield
Nuffield 4/25
Engine Power:Diesel (listed): 25 hp / 18.6 kW
★ Baseline Reference
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