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Farmall 1066 vs Farmall 806
Verdict: Farmall 1066 vs Farmall 806
The Farmall 1066 and the Farmall 806 are both tractors — here is how they stack up on the figures that matter. Farmall 1066 leads on rated power with 116 hp against 110 hp. Farmall 806 is the lighter machine (7,720 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 806 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
110 hp
Confidence
40%
40%
Guide price
—
—
Overview
Manufacturer
Farmall (a part of International Harvester)Reference
Farmall (a part of International Harvester)Reference
Four gears (1-4) in two ranges (Low/High) with the two-speed Torque Amplifier power shift (TA/direct).Reference
As two-range Torque Amplifer (TA) to the basic transmission. Pulling back on the left-hand TA lever provides a clutchless shift to a lower speed for each gear. Pushing the lever forward return to direct-drive mode.Reference
Total built
54,947Reference
42,957Reference
Final drives
—
bull gearReference
Engine
Fuel tank
159.0 LReference
159.0 LReference
Drawbar (claimed)
80.5 kWReference
62.6 kWReference
Drawbar (tested)
79.0 kWReference
63.2 kWReference
Displacement
6.8 LReference
4.9 LReference
Bore/Stroke
109 x 121 mmReference
97 x 112 mmReference
Air cleaner
dual stage dryReference
two-stage dryReference
Rated RPM
2600 (after 1973)Reference
2400Reference
Starter volts
12Reference
12Reference
Oil capacity
17.0 LReference
—
Coolant capacity
23.7 LReference
—
Power at rated engine speed
93.7 kWReference
69.7 kWReference
Max power
79.0 kWReference
60.8 kWReference
LP-gas Fuel tank
—
177.9 LReference
Engine (gross)
—
82.0 kWReference
Compression
—
17:1Reference
Idle RPM
—
900-2400Reference
Power (gross)
—
82.0 kWReference
Transmission
Gears
infinite forward and reverse (two-range)Reference
16 forward and 8 reverseReference
Clutch
dry discReference
12-inch dry discReference
Transmission
Torque AmplifierReference
Torque AmplifierReference
PTO & Hydraulics
PTO (claimed)
94.0 kWReference
70.5 kWReference
PTO (tested)
93.7 kWReference
70.8 kWReference
Type
hydrostaticReference
two-speed power shiftReference
Pump flow
45.4 lpmReference
11.4 lpmReference
Total flow
79.5 lpmReference
—
Steering flow
34.1 lpmReference
34.1 lpmReference
Rear Type
III/IIReference
II/IReference
Rear lift (at 24"/610mm)
2540 kgReference
—
Rear PTO
independentReference
independentReference
Rear PTO Type
540/1000Reference
1000 (1.375)Reference
Power at rated PTO speed
88.9 kWReference
62.0 kWReference
Engine RPM
—
1000@2100Reference
Dimensions
Wheelbase
266 cmReference
257 cmReference
Weight
12148 to 13345 poundsReference
7720 to 8500 poundsReference
Front tire
11L-15Reference
6.50-16Reference
Rear tire
18.4-38Reference
15.5-38Reference
Ag front
11L-15Reference
6.50-16Reference
Ag rear
18.4-38Reference
15.5-38Reference
Length
419 cmReference
408 cmReference
Width
248 cmReference
279 cmReference
Height (exhaust)
281 cmReference
—
Clearance (drawbar)
40 cmReference
—
Bar rear axle
82 mmReference
—
Operating
6053 kgReference
—
Ballasted
6921 kgReference
5395 kgReference
Height (steering wheel)
—
205 cmReference
Rear axle
—
82 mmReference
Front tread
—
20/40 cmReference
Rear tread
—
142 to 238 cmReference
Gasoline Shipping
—
3501 kgReference
Diesel Shipping
—
3855 kgReference
1066 Serial Number Location
1066 Serial Numbers
1971
7101Reference
—
1972
12677Reference
—
1973
24205Reference
—
1974
34949Reference
—
1975
46855Reference
—
1976
56672Reference
—
Test results
Fuel use
31.4 l/hourReference
36.0 l/hourReference
Max pull
5896 kgReference
4115 kgReference
Speeds
Variants
IH 806
—
standard-treadReference
Farmall 806
—
row-cropReference
Farmall 806 attachments
806 Serial Numbers
1963
—
501Reference
1964
—
4709Reference
1965
—
15946Reference
1966
—
24038Reference
1967
—
34943Reference
Electrical
Ground
—
negativeReference
Charging system
—
generatorReference
Charging amps
—
25Reference
Batteries
—
1 (gas/LP)Reference
Battery volts
—
12 (gas/LP)Reference
Battery AH
—
60 (gas/LP)Reference
Questions
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.