Nuffield 4/65
The Nuffield 4/65 is a tractor produced by Nuffield. It is equipped with a 231 ci 3.8 L engine. The listed engine power is Diesel (listed): 65 hp / 48.5 kW. Transmission: 10 forward and 2 reverse. Operating weight: 5140 lbs 2331 kg.
Engine Power
Diesel (listed): 65 hp / 48.5 kW
Fuel & Capacities
19.2 gal
72.7 L
Transmission
10 forward and 2 reverse
Operating Weight
5140 lbs
2331 kg
Overview
 | 1967 - 1969 |
|---|
Production | |
|---|---|
Manufacturer | Nuffield |
Built in Bathgate, Scotland | |
Nuffield 4/65 Engine | |
|---|---|
BMC 3.8L 4-cyl diesel | |
Fuel tank | 19.2 gal
72.7 L |
Engine details ...  | |
Nuffield 4/65 Transmission | |
|---|---|
10-speed gear | |
Transmission details ...  |
Nuffield 4/65 Power | |
|---|---|
Engine | 65 hp
48.5 kW |
PTO (claimed) | 54 hp
40.3 kW |
Mechanical | |
|---|---|
Two-wheel drive | |
Final drives | spur gear |
Steering | manual |
Steering | power OptOptional |
Mechanical disc brakes | |
Open operator station. | |
Tractor hitch | |
|---|---|
Rear Type | II/I |
Control | directional control and top-link draft sensing |
Power Take-off (PTO) | |
|---|---|
Rear PTO | transmission |
independent OptOptional | |
Rear PTO Type | 540 (1.375) |
Engine RPM | 540@1800 |
Dimensions & Tires | |
|---|---|
Wheelbase | 79.9 inches
202 cm |
Weight | 5140 lbs
2331 kg |
Front tire | 6.00-16 |
Rear tire | 11.00-36 |
Full dimensions and tires ...  | |
References | |
|---|---|
 | |
BMC Nuffield 3/45 & 4/65 published in 1968 |
Engine
Engine Detail — 231 ci / 3.8 L Diesel
Manufacturer | BMC |
Fuel Type | Diesel |
Configuration | 4-cylinder 8-valve, liquid-cooled OHV |
Displacement | 231 ci
3.8 L |
Bore/Stroke | 3.937x4.724 inches
100 x 120 mm |
Power | 65 hp
48.5 kW |
Compression | 16.5:1 |
Rated RPM | 2500 |
Idle RPM | 630-2160 |
Torque | 170 lb-ft
230.5 Nm |
Torque RPM | 1200 |
Firing order | 1-3-4-2 |
Starter volts | 12 |
Oil capacity | 9.5 qts
9.0 L |
Coolant capacity | 14.4 qts
13.6 L |
Transmission
Transmission — 10 forward and 2 reverse gear
Type | gear |
Gears | 10 forward and 2 reverse |
Clutch | 280mm dry disc |
Oil capacity | 59.7 qts
56.5 L |
Five gears, plus reverse, in two ranges. | |
With 11-36 rear tires. | |
 | |
Dimensions
Nuffield 4/65 Tires | |
|---|---|
Ag front | 6.00-16 |
Ag rear | 11.00-36 |
Ag front | 7.50-16 |
Ag rear | 12.00-38 |
14.00-30 | |
15.00-30 | |
Dimensions | |
|---|---|
Wheelbase | 79.9 inches
202 cm |
Length | 126.4 inches
321 cm |
Width | 67.7 inches
171 cm |
Height (hood) | 60.6 inches
153 cm |
Height (exhaust) | 86.6 inches
219 cm |
Operating weight | 5140 lbs
2331 kg |
Ground clearance | 23.1 inches
58 cm |
Clearance (front axle) | 17.2 inches
43 cm |
Clearance (drawbar) | 15.3 inches
38 cm |
Front tread | 52 to 76 inches
132 to 193 cm |
Rear tread | 52 to 80 inches
132 to 203 cm |
Rear tread | 54 to 88 inches
137 to 223 cm |
Photos
Nuffield 4-65, right side.
Nuffield 4-65, left side.
Recommended Implements & Sizing Guide
Engineering recommendations for Nuffield 4/65 based on its 65 HP power envelope and ASAE agricultural standards.
| Implement & Operation | Recommended Size | Workload Rating | Engineering Notes |
|---|---|---|---|
Moldboard PlowPrimary Tillage | 3 to 4 Bottom (16")3 - 4 铧 (40 cm) | Heavy Duty | Suitable for medium loam and stubble turnover. |
Rotary Cutter / MowerMowing & Clearing | 7 to 8 ft (84-96 in)2.1 - 2.4 m | Heavy Duty | Heavy-duty twin spindle cutter for overgrown acreage. |
Rotary TillerSeedbed Prep | 78 to 84 in200 - 215 cm | Heavy Duty | Heavy commercial tiller with multi-speed gearbox. |
Disc HarrowSecondary Tillage | 7 to 8 ft Tandem Disc2.1 - 2.4 m 对开双排耙 | Medium Duty | Field leveling and clod breaking behind plows. |
Hay BalerHay & Forage | 4x4 to 4x5 Round Baler1.2x1.5 m 紧凑圆捆机 | Heavy Duty | Silage and dry hay; 540 RPM PTO with slip-clutch. |
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 4/65.
Estimated Continuous Field Runtime: 5.7 hrs
Approximately 5.7 hours of continuous field operation at ~75% rated power on a full tank (19.2 gal / 72.7 L).
Estimated 75% Load Fuel Burn~3.4 gal/hr (12.8 L/hr)
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 4/65 Specification Unit Converter
Convert power, fluid capacities, and operating weights between metric and imperial standards for Nuffield 4/65.
Converted Equivalents:
Horsepower (HP)65 hp
Kilowatts (kW)48.5 kW
Metric Horsepower (PS / CV)65.9 PS
Direct Competitor Comparison
Compare Nuffield 4/65 against same-era industry alternatives in the same horsepower class.
Current Model
Nuffield
Nuffield 4/65
Engine Power:Diesel (listed): 65 hp / 48.5 kW
★ Baseline Reference
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