10 material differences · fewer than 12

Tractor oneDavid Brown 9001957–1958No measured PTO figureTractor twoSOMECA SOM-35 DS/DE1961–1963No measured PTO figure

Which should you choose?

Read our verdict on the 900 and the SOM-35 DS/DE → 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

David Brown 900 and SOMECA SOM-35 DS/DE, field by field
Field	900	SOM-35 DS/DE	Gap
Engine
Engine power, claimed claimed	40.1 hp	40.5 hp	—
Engine declared	DAVID BROWN AK-4/30 J or AG-4/30 J	O.M.-FIAT 615.000	differs
Displacement declared	2.71 L	2.27 L	+19% 900
Maximum torque declared	—	103 lb·ft · 140 N·m	—
Transmission
Top speed declared	15.5 mph · 25 km/h	13.7 mph · 22 km/h	+14% 900
Clutch declared	Pedal-operated dry BORG & BECK single-plate clutch	Pedal-operated two-stage dry double clutch	differs
Hydraulics & hitch
Pump flow declared	10.7 gpm · 40.5 L/min	4.4 gpm · 16.5 L/min	+145% 900
Pressure declared	1,493 psi · 103 bar	2,843 psi · 196 bar	+90% SOM-35 DS/DE
Rear PTO speeds declared	540 rpm	540 rpm	—
Weight & dimensions
Unladen weight declared	3,999 lb · 1,814 kg	3,095 lb · 1,404 kg	+29% 900
Wheelbase declared	75.2 in · 1,911 mm	71.7 in · 1,820 mm	—
Length declared	116.3 in · 2,953 mm	112.6 in · 2,860 mm	—
Width declared	48.5–65.0 in · 1,231–1,651 mm	38.6 in · 980 mm	differs
Height, over the steering wheel declared	54.5 in · 1,384 mm	52.4 in · 1,330 mm	—
Ground clearance declared	16.0 in · 406 mm	17.3 in · 440 mm	+8% SOM-35 DS/DE
Turning radius, braked declared	9.6 ft · 2.91 m	—	—
Fuel tank declared	55.2 qt · 52.2 L	41.2 qt · 39.0 L	+34% 900

Source

Source