David Brown 990 (A) vs Porsche-Diesel Master 418

9 material differences · fewer than 12

Tractor one

1971–1976

No measured PTO figure

Tractor two

1960

No measured PTO figure

Which should you choose?

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

9 material differences · 4 fields identical or within 5%, which is not counted as material

David Brown 990 (A) and Porsche-Diesel Master 418, field by field
Field	990 (A)	Master 418	Gap
Engine
Engine power, claimed claimed	57.3 hp	49.1 hp	+17% 990 (A)
Engine declared	DAVID BROWN AD 4/49	Porsche-Diesel F 418	differs
Displacement declared	3.19 L	3.29 L	—
Maximum torque declared	152 lb·ft · 206 N·m	132 lb·ft · 178 N·m	+16% 990 (A)
Transmission
Top speed declared	15.5 mph · 25 km/h	12.1 mph · 19.4 km/h	+29% 990 (A)
Clutch declared	Dry two-stage double clutch	—	—
Hydraulics & hitch
Pump flow declared	—	6.6 gpm · 25 L/min	—
Three-point lift at ends declared	4,251 lb · 1,928 kg	—	—
Rear PTO speeds declared	540 rpm	579/1135 rpm	differs
Weight & dimensions
Unladen weight declared	5,699 lb · 2,585 kg	4,630 lb · 2,100 kg	+23% 990 (A)
Maximum permissible mass declared	—	8,488 lb · 3,850 kg	—
Wheelbase declared	82.0 in · 2,083 mm	85.3 in · 2,166 mm	—
Length declared	130.0 in · 3,302 mm	133.1 in · 3,380 mm	—
Width declared	67.0 in · 1,702 mm	73.4 in · 1,865 mm	+10% Master 418
Height declared	99.0 in · 2,515 mm	64.4 in · 1,637 mm	+54% 990 (A)
Ground clearance declared	20.9 in · 530 mm	15.7 in · 400 mm	+33% 990 (A)
Turning radius, braked declared	10.8 ft · 3.28 m	11.3 ft · 3.45 m	—
Fuel tank declared	72.3 qt · 68.4 L	48.6 qt · 46 L	+49% 990 (A)

Source

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