8 material differences · fewer than 12

Tractor oneDeutz-Fahr DX 3.901984–1989No measured PTO figureTractor twoDeutz-Fahr DX 801982–1983No measured PTO figure

Which should you choose?

Read our verdict on the DX 3.90 and the DX 80 → It is generated from the rows below by a fixed, versioned rule set, and names the figure behind every call.

8 material differences · 7 fields identical or within 5%, which is not counted as material

Deutz-Fahr DX 3.90 and Deutz-Fahr DX 80, field by field
Field	DX 3.90	DX 80	Gap
Engine
Engine power, claimed claimed	74 hp	74 hp	—
Engine declared	KHD F4L 913	KHD F4L 913	—
Displacement declared	4.09 L	4.09 L	—
Maximum torque declared	192 lb·ft · 260 N·m	196 lb·ft · 266 N·m	—
Transmission
Top speed declared	18.6 mph · 30 km/h	18.6–24.9 mph · 30–40 km/h	differs
Clutch declared	Independent dry double clutch	—	—
Hydraulics & hitch
Hydraulic centre declared	—	Open centre	—
Pump flow declared	11.4 gpm · 43.1 L/min	—	—
Pressure declared	3,481 psi · 240 bar	1,740 psi · 120 bar	+100% DX 3.90
Three-point lift, at the coupling points declared	7,275 lb · 3,300 kg	8,378 lb · 3,800 kg	+15% DX 80
Rear PTO speeds declared	540 rpm / 1000 rpm	540 rpm / 1000 rpm	—
Weight & dimensions
Unladen weight declared	6,923 lb · 3,140 kg	7,937 lb · 3,600 kg	+15% DX 80
Maximum permissible mass declared	11,023 lb · 5,000 kg	—	—
Wheelbase declared	91.6 in · 2,327 mm	91.7 in · 2,330 mm	—
Length declared	153.9 in · 3,910 mm	159.1 in · 4,040 mm	—
Width declared	84.2 in · 2,138 mm	90.6 in · 2,300 mm	+8% DX 80
Height, over the cab declared	97.2 in · 2,470 mm	102.8 in · 2,610 mm	+6% DX 80
Ground clearance declared	18.0 in · 457 mm	23.2 in · 590 mm	+29% DX 80
Fuel tank declared	100.4 qt · 95.0 L	126.8 qt · 120 L	+26% DX 80

Source

Source