Bührer PF-21 Super (A) vs Renault 651 (S)

11 material differences · fewer than 12

Tractor one

1968–1974

No measured PTO figure

Tractor two

1972–1986

No measured PTO figure

Which should you choose?

Read our verdict on the PF-21 Super (A) and the 651 (S) → It is generated from the rows below by a fixed, versioned rule set, and names the figure behind every call.

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

Bührer PF-21 Super (A) and Renault 651 (S), field by field
Field	PF-21 Super (A)	651 (S)	Gap
Engine
Engine power, claimed claimed	66.1 hp	64.1 hp	—
Engine declared	FORD (GB) 2.514 E	MWM D 227-4	differs
Displacement declared	4.18 L	3.77 L	+11% PF-21 Super (A)
Maximum torque declared	183 lb·ft · 248 N·m	164 lb·ft · 222 N·m	+12% PF-21 Super (A)
Transmission
Top speed declared	15.5 mph · 25 km/h	15.5 mph · 25 km/h	—
Clutch declared	Pedal-operated dry Buhrer double disc clutch between gearbox and group transmission	Dry LuK double clutch	differs
Hydraulics & hitch
Pump flow declared	5.2 gpm · 19.5 L/min	6.9 gpm · 26.0 L/min	+33% 651 (S)
Pressure declared	—	2,321 psi · 160 bar	—
Three-point lift at ends declared	5,181 lb · 2,350 kg	4,938 lb · 2,240 kg	—
Rear PTO speeds declared	540/770 rpm	540 rpm	differs
Weight & dimensions
Unladen weight declared	5,357 lb · 2,430 kg	5,886 lb · 2,670 kg	+10% 651 (S)
Wheelbase declared	84.3 in · 2,140 mm	88.3 in · 2,242 mm	—
Length declared	129.5 in · 3,290 mm	142.4 in · 3,617 mm	+10% 651 (S)
Width declared	69.3 in · 1,760 mm	73.2 in · 1,860 mm	+6% 651 (S)
Height declared	65.7 in · 1,670 mm	86.6 in · 2,200 mm	+32% 651 (S)
Ground clearance declared	15.0 in · 380 mm	17.7 in · 450 mm	+18% 651 (S)
Turning radius, braked declared	10.9 ft · 3.33 m	10.8 ft · 3.30 m	—
Fuel tank declared	—	68.7 qt · 65.0 L	—

Source

Source