Compare/International Harvester 4166 vs International Harvester 6588

International Harvester 4166 vs International Harvester 6588

Verdict: International Harvester 4166 vs International Harvester 6588

The International Harvester 4166 and the International Harvester 6588 are both tractors — here is how they stack up on the figures that matter. International Harvester 4166 leads on rated power with 151 hp against 150 hp. International Harvester 6588 is the lighter machine (7,402 kg vs 15,300 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. International Harvester 6588 is the newer design (1981 vs 1972). In short: choose the International Harvester 4166 for outright pulling power, or the International Harvester 6588 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

151 hp

150 hp

Confidence

40%

Guide price

—

Overview

Manufacturer

International HarvesterReference

Gear 1-Low used for pull test.Reference

With 18.4-34 tires.Reference

Drive

4x4 4WDReference

—

Final drives

planetaryReference

—

Steering

hydraulic powerReference

articulated hydrostatic powerReference

Total built

—

642Reference

Engine

Fuel tank

378.5 LReference

—

Engine

130.5 kWReference

132.0 kWReference

Drawbar (tested)

95.1 kWReference

94.1 kWReference

Displacement

7.1 LReference

7.6 LReference

Bore/Stroke

109 x 127 mmReference

109 x 136 mmReference

Power

130.5 kWReference

132.0 kWReference

Fuel system

direct injectionReference

—

Compression

16:1Reference

—

Rated RPM

2400Reference

Starter volts

12Reference

Oil capacity

17.0 LReference

89.4 LReference

Coolant capacity

30.3 LReference

32.2 LReference

Power at rated engine speed

112.3 kWReference

112.2 kWReference

Max power

95.1 kWReference

94.1 kWReference

Drawbar (claimed)

—

96.9 kWReference

Transmission

Gears

8 forward and 4 reverseReference

16 forward and 8 reverseReference

Clutch

dry discReference

—

PTO & Hydraulics

PTO (tested)

112.3 kWReference

112.2 kWReference

Type

sliding gearReference

two-range power shiftReference

Valves

3Reference

2 to 4Reference

Pump flow

62.5 lpmReference

68.1 lpmReference

Rear Type

IIIReference

III/IIReference

Rear lift (at ends)

2721 kgReference

—

Rear PTO

independentReference

Rear PTO Type

1000Reference

Power at rated PTO speed

113.9 kWReference

113.4 kWReference

PTO (claimed)

—

111.9 kWReference

Hydraulic system

—

89.3 LReference

Capacity

—

89.3 LReference

Steering flow

—

45.4 lpmReference

Dimensions

Wheelbase

259 cmReference

279 cmReference

Weight

7212 kgReference

7402 kgReference

Front tire

23.1-26Reference

18.4-38Reference

Rear tire

23.1-26Reference

18.4-38Reference

Ag front

23.1-26Reference

18.4-38Reference

Ag rear

23.1-26Reference

18.4-38Reference

Length

492 cmReference

579 cmReference

Width

261 cmReference

258 cmReference

Height (steering wheel)

236 cmReference

—

Height (exhaust)

350 cmReference

—

Shipping weight

6940 kgReference

7402 kgReference

Ground clearance

43 cmReference

72 cmReference

Front tread

203 cmReference

—

Rear tread

203 cmReference

—

Bar rear axle

—

82 mmReference

Electrical

Charging system

alternatorReference

—

Charging amps

72Reference

—

Batteries

2Reference

—

Battery volts

6Reference

12Reference

Ground

—

negativeReference

Test results

Fuel use

34.4 l/hourReference

34.1 l/hourReference

Max pull

8815 kgReference

7978 kgReference

Capacities

Fuel

—

526.1 LReference

6588 Serial Numbers

1981

—

8801Reference

1982

—

8966Reference

1983

—

9164Reference

1984

—

9361Reference

1985

—

9526Reference

Location:

—

transmission housing, right sideReference

International Harvester 6588 Height

Hood

—

202 cmReference

Cab

—

289 cmReference

Exhaust

—

318 cmReference

Speeds

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.