Compare/International Harvester 1066 vs International Harvester A-986

International Harvester 1066 vs International Harvester A-986

Verdict: International Harvester 1066 vs International Harvester A-986

The International Harvester 1066 and the International Harvester A-986 are both tractors — here is how they stack up on the figures that matter. International Harvester 1066 leads on rated power with 116 hp against 115 hp. International Harvester A-986 is the lighter machine (5,533 kg vs 12,148 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. International Harvester A-986 is the newer design (1978 vs 1971). In short: choose the International Harvester 1066 for outright pulling power, or the International Harvester A-986 if a tighter budget and lighter footprint matter more. Compare the full spec tables below before booking a demo.

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Acreage600 acBudgetMain crop / use

Fit & specs

International Harvester

Fit score

Best match

Clear

International Harvester

Fit score

Best match

Clear

Rated power

116 hp

115 hp

Confidence

40%

Guide price

—

Overview

Manufacturer

International HarvesterReference

Four gears (1-4) in two ranges (Low/High) with the two-speed Torque Amplifier power shift (TA/direct).Reference

liquid-cooled inlineReference

Total built

54,947Reference

492Reference

Final drives

—

bull gearReference

Differential lock

—

electro-hydraulic rearReference

Variants

1066 Hi-Clear

high-cropReference

—

Engine

Fuel tank

159.0 LReference

—

Drawbar (claimed)

80.5 kWReference

76.8 kWReference

Drawbar (tested)

79.0 kWReference

—

Displacement

6.8 LReference

5.9 LReference

Bore/Stroke

109 x 121 mmReference

98 x 129 mmReference

Air cleaner

dual stage dryReference

—

Rated RPM

2600 (after 1973)Reference

2500Reference

Starter volts

12Reference

Oil capacity

17.0 LReference

—

Coolant capacity

23.7 LReference

—

Power at rated engine speed

93.7 kWReference

—

Max power

79.0 kWReference

—

Engine

—

99.2 kWReference

Power

—

99.2 kWReference

Torque

—

450.2 NmReference

Torque RPM

—

1600Reference

Starter

—

electricReference

Transmission

Gears

infinite forward and reverse (two-range)Reference

16 forward and 8 reverseReference

Clutch

dry discReference

356mm cerametallic discReference

Transmission

Torque AmplifierReference

PTO & Hydraulics

PTO (claimed)

94.0 kWReference

85.8 kWReference

PTO (tested)

93.7 kWReference

—

Type

hydrostaticReference

two-speed power shiftReference

Pump flow

45.4 lpmReference

—

Total flow

79.5 lpmReference

—

Steering flow

34.1 lpmReference

—

Rear Type

III/IIReference

—

Rear lift (at 24"/610mm)

2540 kgReference

—

Rear PTO

independentReference

—

Rear PTO Type

540/1000Reference

—

Power at rated PTO speed

88.9 kWReference

—

Dimensions

Wheelbase

266 cmReference

Weight

12148 to 13345 poundsReference

5533 kgReference

Front tire

11L-15Reference

—

Rear tire

18.4-38Reference

—

Ag front

11L-15Reference

—

Ag rear

18.4-38Reference

—

Length

419 cmReference

403 cmReference

Width

248 cmReference

259 cmReference

Height (exhaust)

281 cmReference

—

Clearance (drawbar)

40 cmReference

—

Bar rear axle

82 mmReference

—

Operating

6053 kgReference

—

Ballasted

6921 kgReference

—

Height (cab)

—

289 cmReference

Shipping weight

—

5533 kgReference

Ground clearance

—

38 cmReference

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

—

Max pull

5896 kgReference

—

Speeds

Electrical

Ground

—

negativeReference

Batteries

—

2Reference

Battery volts

—

12Reference

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.