Compare/International Harvester 1066 vs International Harvester 986B

International Harvester 1066 vs International Harvester 986B

Verdict: International Harvester 1066 vs International Harvester 986B

The International Harvester 1066 and the International Harvester 986B 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 986B is the lighter machine (5,640 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 986B is the newer design (1981 vs 1971). In short: choose the International Harvester 1066 for outright pulling power, or the International Harvester 986B 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-cooledReference

Total built

54,947Reference

328Reference

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

Fuel system

—

direct injectionReference

Torque

—

450.1 NmReference

Torque RPM

—

1600Reference

Starter

—

electricReference

Transmission

Gears

infinite forward and reverse (two-range)Reference

16 forward and 8 reverseReference

Clutch

dry discReference

—

Transmission

Torque AmplifierReference

International Harvester 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

IIIReference

Rear lift (at 24"/610mm)

2540 kgReference

—

Rear PTO

independentReference

—

Rear PTO Type

540/1000Reference

Power at rated PTO speed

88.9 kWReference

—

Hydraulic system

—

85.2 LReference

Capacity

—

85.2 LReference

Rear valves

—

2Reference

Rear lift (at ends)

—

2844 kgReference

Dimensions

Wheelbase

266 cmReference

—

Weight

12148 to 13345 poundsReference

5640 kgReference

Front tire

11L-15Reference

11.00-16Reference

Rear tire

18.4-38Reference

23.1-34Reference

Ag front

11L-15Reference

—

Ag rear

18.4-38Reference

—

Length

419 cmReference

405 cmReference

Width

248 cmReference

258 cmReference

Height (exhaust)

281 cmReference

—

Clearance (drawbar)

40 cmReference

—

Bar rear axle

82 mmReference

—

Operating

6053 kgReference

—

Ballasted

6921 kgReference

—

Standard tires (ag)

—

Front: 11.00-16. Rear: 23.1-34Reference

Shipping weight

—

5640 kgReference

Ground clearance

—

55 cmReference

1066 Serial Number Location

1066 Serial Numbers

1971

7101Reference

—

1972

12677Reference

—

1973

24205Reference

—

1974

34949Reference

—

1975

46855Reference

—

1976

56672Reference

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Test results

Fuel use

31.4 l/hourReference

—

Max pull

5896 kgReference

—

Speeds

Electrical

Ground

—

negativeReference

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.