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Farmall 1066 vs Farmall Hydro 100
Verdict: Farmall 1066 vs Farmall Hydro 100
The Farmall 1066 and the Farmall Hydro 100 are both tractors — here is how they stack up on the figures that matter. Farmall 1066 leads on rated power with 116 hp against 104 hp. Farmall Hydro 100 is the lighter machine (11,470 kg vs 12,148 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. In short: choose the Farmall 1066 for outright pulling power, or the Farmall Hydro 100 if a tighter budget and lighter footprint matter more. Compare the full spec tables below before booking a demo.
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Fit & specs
Farmall
85
Fit score
Best match
Clear
Farmall
85
Fit score
Best match
Clear
Rated power
116 hp
104 hp
Confidence
40%
40%
Guide price
—
—
Overview
Manufacturer
Farmall (a part of International Harvester)Reference
International HarvesterReference
Four gears (1-4) in two ranges (Low/High) with the two-speed Torque Amplifier power shift (TA/direct).Reference
Gear 2.85 MPH used for pull test.Reference
Total built
54,947Reference
—
Differential lock
—
mechanical rearReference
Engine
Fuel tank
159.0 LReference
—
Drawbar (claimed)
80.5 kWReference
59.7 kWReference
Drawbar (tested)
79.0 kWReference
58.4 kWReference
Displacement
6.8 LReference
7.1 LReference
Bore/Stroke
109 x 121 mmReference
109 x 127 mmReference
Air cleaner
dual stage dryReference
dual stage dryReference
Rated RPM
2600 (after 1973)Reference
2400Reference
Starter volts
12Reference
12Reference
Oil capacity
17.0 LReference
102.2 LReference
Coolant capacity
23.7 LReference
24.6 LReference
Power at rated engine speed
93.7 kWReference
77.7 kWReference
Max power
79.0 kWReference
58.4 kWReference
Compression
—
15.8:1Reference
Idle RPM
—
900-2400Reference
Transmission
Gears
infinite forward and reverse (two-range)Reference
infinite forward and reverse (2-range)Reference
Clutch
dry discReference
—
Transmission
Torque AmplifierReference
—
PTO & Hydraulics
PTO (claimed)
94.0 kWReference
77.6 kWReference
PTO (tested)
93.7 kWReference
77.7 kWReference
Type
hydrostaticReference
hydrostaticReference
Pump flow
45.4 lpmReference
45.4 lpmReference
Total flow
79.5 lpmReference
—
Steering flow
34.1 lpmReference
—
Rear Type
III/IIReference
IIReference
Rear lift (at 24"/610mm)
2540 kgReference
—
Rear PTO
independentReference
independentReference
Rear PTO Type
540/1000Reference
540/1000 (1.375)Reference
Power at rated PTO speed
88.9 kWReference
75.5 kWReference
Hydraulic system
—
102.2 LReference
Capacity
—
102.2 LReference
Rear valves
—
2Reference
Control
—
lower-link draft sensingReference
Engine RPM
—
1000@2072Reference
Dimensions
Wheelbase
266 cmReference
266 cmReference
Weight
12148 to 13345 poundsReference
11470 to 12130 poundsReference
Front tire
11L-15Reference
10.00-16Reference
Rear tire
18.4-38Reference
18.4-34Reference
Ag front
11L-15Reference
10.00-16Reference
Ag rear
18.4-38Reference
18.4-34Reference
Length
419 cmReference
426 cmReference
Width
248 cmReference
259 cmReference
Height (exhaust)
281 cmReference
274 cmReference
Clearance (drawbar)
40 cmReference
35 cmReference
Bar rear axle
82 mmReference
82 mmReference
Operating
6053 kgReference
—
Ballasted
6921 kgReference
—
Height (cab)
—
289 cmReference
Shipping weight
—
5202 kgReference
Operating weight
—
5502 kgReference
Front tread
—
152 to 213 cmReference
Rear tread
—
167 to 325 cmReference
1066 Serial Number Location
1066 Serial Numbers
1971
7101Reference
—
1972
12677Reference
—
1973
24205Reference
7501Reference
1974
34949Reference
7727Reference
1975
46855Reference
10915Reference
1976
56672Reference
12434Reference
Test results
Fuel use
31.4 l/hourReference
25.7 l/hourReference
Max pull
5896 kgReference
4445 kgReference
Speeds
Capacities
Fuel
—
159.0 LReference
Hydro 100 Serial Numbers
Location:
—
Serial number plate on the left side of the transmission housing.Reference
Electrical
Charging system
—
alternatorReference
Charging amps
—
72Reference
Fit score weighs budget, operation size, crop match and data confidence against the details above. It’s guidance, not advice — always confirm with a dealer demo.