ALLIS-CHALMERS FD-4 vs Renault 51

10 material differences · fewer than 12

Tractor one

1962–1965

No measured PTO figure

Tractor two

1968–1972

No measured PTO figure

Which should you choose?

Read our verdict on the FD-4 and the 51 → It is generated from the rows below by a fixed, versioned rule set, and names the figure behind every call.

10 material differences · 2 fields identical or within 5%, which is not counted as material

ALLIS-CHALMERS FD-4 and Renault 51, field by field
Field	FD-4	51	Gap
Engine
Engine power, claimed claimed	41.4 hp	41.4 hp	—
Engine declared	VENDEUVRE 56	—	—
Transmission
Top speed declared	12.4 mph · 20 km/h	15.5 mph · 25 km/h	+25% 51
Clutch declared	Pedal operated dry two stage double clutch	Two-stage pedal operated dry FERODO double clutch type 11 LFGM 29	differs
Hydraulics & hitch
Three-point lift at ends declared	1,984 lb · 900 kg	4,409 lb · 2,000 kg	+122% 51
Rear PTO speeds declared	540/1000 rpm	540 rpm	differs
Weight & dimensions
Unladen weight declared	4,057 lb · 1,840 kg	3,527 lb · 1,600 kg	+15% FD-4
Wheelbase declared	84.6 in · 2,150 mm	70.9 in · 1,800 mm	+19% FD-4
Length declared	120.1 in · 3,050 mm	123.6 in · 3,140 mm	—
Width declared	66.1 in · 1,680 mm	57.5 in · 1,460 mm	+15% FD-4
Height declared	56.7 in · 1,440 mm	60.6 in · 1,540 mm	+7% 51
Ground clearance declared	18.5 in · 470 mm	15.0 in · 380 mm	+24% FD-4
Turning radius, braked declared	—	9.5 ft · 2.90 m	—
Fuel tank declared	63.4 qt · 60.0 L	58.1 qt · 55.0 L	+9% FD-4

Source

Source