Compare/International Harvester 660 vs International Harvester 745

International Harvester 660 vs International Harvester 745

Verdict: International Harvester 660 vs International Harvester 745

The International Harvester 660 and the International Harvester 745 are both tractors — here is how they stack up on the figures that matter. International Harvester 660 leads on rated power with 79 hp against 78 hp. International Harvester 745 is the lighter machine (6,724 kg vs 9,635 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. International Harvester 660 holds more fuel (124.9 L vs 106.0 L) for longer stints between fills. International Harvester 745 is the newer design (1980 vs 1959). In short: choose the International Harvester 660 for outright pulling power, or the International Harvester 745 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

79 hp

78 hp

Confidence

40%

Guide price

—

Overview

Manufacturer

International HarvesterReference

The Torque Amplifier (TA) provides a clutchless shift-on-the-move between direct drive (DD) and the lower TA speed.Reference

Four gears in two ranges, plus reverse range.Reference

Total built

6,945Reference

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Original price

$6,000 (1963)Reference

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Steering

hydrostatic power optionalReference

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Final drives

—

planetaryReference

Differential lock

—

mechanical rearReference

Engine

Fuel tank

141.9 LReference

106.0 LReference

Engine

70.8 kWReference

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Plows

6Reference

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Drawbar (tested)

52.4 kWReference

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Displacement

4.6 LReference

3.9 LReference

Bore/Stroke

94 x 112 mmReference

98 x 129 mmReference

Power

70.8 kWReference

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Air cleaner

oil bathReference

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Compression

8.75:1Reference

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Rated RPM

2400Reference

2300Reference

Torque

287.5 NmReference

251.0 NmReference

Torque RPM

1200Reference

1600Reference

Oil capacity

60.6 LReference

9.0 LReference

Coolant capacity

19.9 LReference

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Firing order

1-5-3-6-2-4Reference

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Power at rated engine speed

60.1 kWReference

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Max power

51.9 kWReference

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Engine (gross)

—

58.0 kWReference

Engine (net)

—

53.5 kWReference

Rated Power (net)

—

53.5 kWReference

Power (gross)

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58.0 kWReference

Starter

—

electricReference

Starter volts

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12Reference

Oil change

—

200 hReference

Transmission

Torque AmplifierReference

IH SynchronReference

Gears

10 forward and 2 reverseReference

8 forward and 4 reverseReference

Type

—

creeperReference

PTO & Hydraulics

PTO (tested)

60.7 kWReference

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Valves

1Reference

—

Total flow

64.3 lpmReference

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Steering flow

9.5 lpmReference

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Rear PTO

independentReference

liveReference

Rear PTO Type

540Reference

540/1000Reference

PTO (claimed)

—

49.7 kWReference

Pump flow

—

29.9 lpmReference

Rear Type

—

IIReference

Control

—

position and lower-link draft control.Reference

Rear lift

—

3099 kgReference

Dimensions

Wheelbase

217 cmReference

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Weight

9635 to 9875 poundsReference

6724 to 8422 poundsReference

Front tire

7.50-18Reference

Rear tire

18.4/15-34Reference

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Ag front

7.50-18Reference

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Ag rear

18.4/15-34Reference

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Industrial rear

16.9/14-34Reference

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Length

362 cmReference

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Width

198 cmReference

203 cmReference

Height (steering wheel)

187 cmReference

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Ground clearance

50 cmReference

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Clearance (front axle)

44 cmReference

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Operating

4479 kgReference

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Ballasted

6919 kgReference

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2WD Wheelbase

—

222 cmReference

4WD Wheelbase

—

218 cmReference

2WD Rear tire

—

16.9R34Reference

2WD Standard tires (ag)

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Front: 7.50-18. Rear: 16.9R34Reference

4WD Standard tires (ag)

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Front: 12.4R24. Rear: 16.9R34Reference

2WD Length

—

376 cmReference

4WD Length

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381 cmReference

Height (ROPS)

—

254 cmReference

Height (cab)

—

266 cmReference

2WD Ground clearance

—

48 cmReference

4WD Ground clearance

—

40 cmReference

2WD Front tread

—

134 to 182 cmReference

4WD Front tread

—

164 to 181 cmReference

Rear tread

—

157 to 198 cmReference

2WD ROPS

—

3050 kgReference

2WD Cab

—

3430 kgReference

4WD ROPS

—

3440 kgReference

4WD Cab

—

3820 kgReference

International Harvester 660 attachments

660 Serial Number Location

660 Serial Numbers

1959

501Reference

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1960

3398Reference

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1961

4259Reference

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1962

5883Reference

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1963

6995Reference

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Final

?Reference

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Test results

Fuel use

33.3 l/hourReference

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Max pull

5010 kgReference

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Speeds

Variants

745S

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ROPSReference

745XL

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CabReference

Electrical

Ground

—

negativeReference

Charging system

—

alternatorReference

Charging amps

—

33Reference

Battery volts

—

12Reference

Battery AH

—

88Reference

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.