International Harvester D-439 vs Nuffield M-3

11 material differences · fewer than 12

Tractor one

1962–1966

No measured PTO figure

Tractor two

1948–1954

No measured PTO figure

Which should you choose?

Read our verdict on the D-439 and the M-3 → It is generated from the rows below by a fixed, versioned rule set, and names the figure behind every call.

11 material differences · 3 fields identical or within 5%, which is not counted as material

International Harvester D-439 and Nuffield M-3, field by field
Field	D-439	M-3	Gap
Engine
Engine power, claimed claimed	38.5 hp	38.0 hp	—
Engine declared	INTERNATIONAL-HARVESTER DD-148	MORRIS-COMMERCIAL 38 T/V/T	differs
Displacement declared	2.43 L	3.77 L	+55% M-3
Maximum torque declared	98 lb·ft · 133 N·m	138 lb·ft · 187 N·m	+41% M-3
Transmission
Top speed declared	12.4 mph · 20 km/h	17.4 mph · 28 km/h	+40% M-3
Clutch declared	Pedal operated dry single plate clutch from Fichtel & Sachs	—	—
Hydraulics & hitch
Pump flow declared	6.3 gpm · 24.0 L/min	7.2 gpm · 27.3 L/min	+14% M-3
Pressure declared	2,119 psi · 146 bar	—	—
Three-point lift at ends declared	1,984 lb · 900 kg	—	—
Rear PTO speeds declared	540 rpm	540 rpm	—
Weight & dimensions
Unladen weight declared	3,876 lb · 1,758 kg	4,848 lb · 2,199 kg	+25% M-3
Wheelbase declared	74.0 in · 1,880 mm	83.0 in · 2,108 mm	+12% M-3
Length declared	115.4 in · 2,930 mm	126.0 in · 3,200 mm	+9% M-3
Width declared	64.6 in · 1,640 mm	80.0 in · 2,032 mm	+24% M-3
Height declared	61.0 in · 1,550 mm	61.5 in · 1,562 mm	—
Ground clearance declared	15.0 in · 380 mm	23.0 in · 584 mm	+54% M-3
Turning radius, braked declared	8.9 ft · 2.70 m	—	—
Fuel tank declared	58.1 qt · 55.0 L	76.8 qt · 72.7 L	+32% M-3

Source

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