David Brown 990 Selectmatic vs Porsche-Diesel Master 418

13 material differences

Tractor one

1965–1979

No measured PTO figure

Tractor two

1960

No measured PTO figure

Which should you choose?

Read our verdict on the 990 Selectmatic and the Master 418 → It is generated from the rows below by a fixed, versioned rule set, and names the figure behind every call.

13 material differences · 0 fields identical or within 5%, which is not counted as material

David Brown 990 Selectmatic and Porsche-Diesel Master 418, field by field
Field	990 Selectmatic	Master 418	Gap
Engine
Engine power, claimed claimed	—	49.1 hp	—
Engine declared	DAVID BROWN AD 4/47 or AD 4/49 A (B)	Porsche-Diesel F 418	differs
Displacement declared	—	3.29 L	—
Maximum torque declared	140 lb·ft · 190 N·m	132 lb·ft · 178 N·m	+7% 990 Selectmatic
Transmission
Top speed declared	15.5 mph · 25 km/h	12.1 mph · 19.4 km/h	+29% 990 Selectmatic
Clutch declared	pedal-operated dry Borg & Beck single-disc clutch	—	—
Hydraulics & hitch
Pump flow declared	7.3 gpm · 27.5 L/min	6.6 gpm · 25 L/min	+10% 990 Selectmatic
Three-point lift at ends declared	2,000 lb · 907 kg	—	—
Rear PTO speeds declared	540 rpm	579/1135 rpm	differs
Weight & dimensions
Unladen weight declared	5,688 lb · 2,580 kg	4,630 lb · 2,100 kg	+23% 990 Selectmatic
Maximum permissible mass declared	—	8,488 lb · 3,850 kg	—
Wheelbase declared	78.7 in · 2,000 mm	85.3 in · 2,166 mm	+8% Master 418
Length declared	126.0 in · 3,200 mm	133.1 in · 3,380 mm	+6% Master 418
Width declared	67.0 in · 1,702 mm	73.4 in · 1,865 mm	+10% Master 418
Height declared	59.5 in · 1,511 mm	64.4 in · 1,637 mm	+8% Master 418
Ground clearance declared	21.4 in · 543 mm	15.7 in · 400 mm	+36% 990 Selectmatic
Turning radius, braked declared	10.3 ft · 3.14 m	11.3 ft · 3.45 m	+10% Master 418
Fuel tank declared	64.9 qt · 61.4 L	48.6 qt · 46 L	+33% 990 Selectmatic

Source

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