Bührer PF-21 Super (A) vs J.I. Case 1390 (DT)

10 material differences · fewer than 12

Tractor one

1968–1974

No measured PTO figure

Tractor two

1980–1984

No measured PTO figure

Which should you choose?

Read our verdict on the PF-21 Super (A) and the 1390 (DT) → It is generated from the rows below by a fixed, versioned rule set, and names the figure behind every call.

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

Bührer PF-21 Super (A) and J.I. Case 1390 (DT), field by field
Field	PF-21 Super (A)	1390 (DT)	Gap
Engine
Engine power, claimed claimed	66.1 hp	66.1 hp	—
Engine declared	FORD (GB) 2.514 E	DAVID BROWN AD 4/55	differs
Displacement declared	4.18 L	3.20 L	+31% PF-21 Super (A)
Maximum torque declared	183 lb·ft · 248 N·m	168 lb·ft · 228 N·m	+9% PF-21 Super (A)
Transmission
Top speed declared	15.5 mph · 25 km/h	18.6 mph · 30 km/h	+20% 1390 (DT)
Clutch declared	Pedal-operated dry Buhrer double disc clutch between gearbox and group transmission	Dry Borg and Beck double clutch	differs
Hydraulics & hitch
Pump flow declared	5.2 gpm · 19.5 L/min	8.7 gpm · 32.9 L/min	+69% 1390 (DT)
Three-point lift at ends declared	5,181 lb · 2,350 kg	—	—
Rear PTO speeds declared	540/770 rpm	540 rpm	differs
Weight & dimensions
Unladen weight declared	5,357 lb · 2,430 kg	6,363 lb · 2,886 kg	+19% 1390 (DT)
Wheelbase declared	84.3 in · 2,140 mm	83.0 in · 2,108 mm	—
Length declared	129.5 in · 3,290 mm	142.9 in · 3,630 mm	+10% 1390 (DT)
Width declared	69.3 in · 1,760 mm	72.8 in · 1,850 mm	—
Height declared	65.7 in · 1,670 mm	100.0 in · 2,540 mm	+52% 1390 (DT)
Ground clearance declared	15.0 in · 380 mm	15.0 in · 381 mm	—
Turning radius, braked declared	10.9 ft · 3.33 m	10.5 ft · 3.20 m	—
Fuel tank declared	—	99.3 qt · 94.0 L	—

Source

Source