David Brown 990 (A) vs Fiat 55-90 (DT)

13 material differences

Tractor one

David Brown 990 (A)

1971–1976

No measured PTO figure

Tractor two

Fiat 55-90 (DT)

1984–1992

No measured PTO figure

Which should you choose?

We will not advise between these two machines, because they were not built in overlapping years (1971–1976; 1984–1992). The figures below are side by side so you can judge them yourself; each says whether it was measured, claimed or declared by its source.

Field by field

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

David Brown 990 (A) and Fiat 55-90 (DT), field by field
Field	990 (A)	55-90 (DT)	Gap
Engine
Engine power, claimed claimed	57.3 hp	54.3 hp	+5% 990 (A)
Engine declared	DAVID BROWN AD 4/49	FIAT-IVECO 8035.06.200 or (300)	differs
Displacement declared	3.19 L	2.71 L	+18% 990 (A)
Maximum torque declared	152 lb·ft · 206 N·m	129 lb·ft · 175 N·m	+18% 990 (A)
Transmission
Top speed declared	15.5 mph · 25 km/h	18.6–24.9 mph · 30–40 km/h	differs
Clutch declared	Dry two-stage double clutch	Dry Valeo, O.M.G. or LuK double clutch	differs
Hydraulics & hitch
Three-point lift at ends declared	4,251 lb · 1,928 kg	5,324 lb · 2,415 kg	+25% 55-90 (DT)
Rear PTO speeds declared	540 rpm	540/1000 rpm	differs
Weight & dimensions
Unladen weight declared	5,699 lb · 2,585 kg	6,129 lb · 2,780 kg	+8% 55-90 (DT)
Wheelbase declared	82.0 in · 2,083 mm	87.7 in · 2,227 mm	+7% 55-90 (DT)
Length declared	130.0 in · 3,302 mm	147.0 in · 3,733 mm	+13% 55-90 (DT)
Width declared	67.0 in · 1,702 mm	67.3 in · 1,710 mm	—
Height declared	99.0 in · 2,515 mm	98.8 in · 2,510 mm	—
Ground clearance declared	20.9 in · 530 mm	17.5 in · 445 mm	+19% 990 (A)
Turning radius, braked declared	10.8 ft · 3.28 m	11.4 ft · 3.46 m	+5% 55-90 (DT)
Fuel tank declared	72.3 qt · 68.4 L	98.3 qt · 93.0 L	+36% 55-90 (DT)

David Brown 990 (A) sources

Source

Source: Traktorenlexikon, “David Brown 900 Synchromesh”

Fiat 55-90 (DT) sources

Source

Source: Traktorenlexikon, “Fiatagri 55-90/55-90 DT”