Compare/International Harvester 1206 vs International Harvester 3688

International Harvester 1206 vs International Harvester 3688

Verdict: International Harvester 1206 vs International Harvester 3688

The International Harvester 1206 and the International Harvester 3688 are both tractors — here is how they stack up on the figures that matter. International Harvester 3688 leads on rated power with 114 hp against 113 hp. International Harvester 1206 is the lighter machine (4,588 kg vs 11,300 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. International Harvester 3688 is the newer design (1981 vs 1965). In short: choose the International Harvester 3688 for outright pulling power, or the International Harvester 1206 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

113 hp

114 hp

Confidence

40%

Guide price

—

Overview

Manufacturer

International HarvesterReference

The Torque Amplifier (TA) provides a clutchless power shift between Direct Drive (DD) and the lower TA gearing.Reference

With 18.4-34R1 rear tires.Reference

Total built

1,289Reference

2,572Reference

Final drives

—

bull gearReference

Differential lock

—

rearReference

Variants

IH 1206

standard frontReference

—

Farmall 1206

row-cropReference

—

Wheatland

larger platform, heavy drawbarReference

—

3688 Hi-Clear

—

high-clearance modelReference

Engine

Fuel tank

132.5 LReference

—

Drawbar (claimed)

74.3 kWReference

74.7 kWReference

Drawbar (tested)

70.8 kWReference

74.0 kWReference

Displacement

5.9 LReference

7.1 LReference

Bore/Stroke

105 x 108 mmReference

109 x 127 mmReference

Air cleaner

two-stage dryReference

dual dry elmementReference

Compression

17.0:1Reference

16:1Reference

Rated RPM

2400Reference

Starter volts

12Reference

Power at rated engine speed

84.0 kWReference

84.8 kWReference

Max power

70.8 kWReference

74.0 kWReference

Idle RPM

—

900-2400Reference

Coolant capacity

—

24.6 LReference

Oil capacity

—

85.2 LReference

Transmission

Type

partial power shiftReference

Gears

16 forward and 8 reverseReference

Transmission

Torque AmplifierReference

—

Clutch

—

355.6mm cerametallic discReference

PTO & Hydraulics

PTO (claimed)

84.0 kWReference

84.3 kWReference

PTO (tested)

84.0 kWReference

84.8 kWReference

Valves

0 to 2Reference

2 to 4Reference

Pump flow

45.4 lpmReference

68.1 lpmReference

Rear Type

IIIReference

IIReference

Rear PTO

independentReference

Rear PTO Type

1000Reference

540/1000 (1.375)Reference

Power at rated PTO speed

79.5 kWReference

83.9 kWReference

Hydraulic system

—

85.2 LReference

Capacity

—

85.2 LReference

Total flow

—

102.2 lpmReference

Steering flow

—

45.4 lpmReference

Control

—

draft sensingReference

Engine RPM

—

1000@2100Reference

Dimensions

Wheelbase

231 cmReference

266 cmReference

Weight

4588 kgReference

11300 to 13200 poundsReference

Front tire

11.00-16Reference

11L-15Reference

Rear tire

24.5-32Reference

18.4-34Reference

Ag front

11.00-16Reference

11L-15Reference

Ag rear

24.5-32Reference

18.4-34Reference

Length

388 cmReference

467 cmReference

Width

238 cmReference

259 cmReference

Height (steering wheel)

218 cmReference

—

Operating weight

4588 kgReference

5987 kgReference

Ballasted weight

6159 kgReference

—

Bar rear axle

82 mmReference

—

Height (cab)

—

284 cmReference

Shipping weight

—

5125 kgReference

Ground clearance

—

33 cmReference

Rear axle

—

82 by 2997 mmReference

Front tread

—

152 to 213 cmReference

Rear tread

—

167 to 326 cmReference

1206 Serial Number Location

1206 Serial Numbers

1965

7501Reference

—

1966

7772Reference

—

1967

8492Reference

—

Test results

Fuel use

26.5 l/hourReference

26.9 l/hourReference

Max pull

4873 kgReference

5556 kgReference

Capacities

Fuel

—

189.2 LReference

3688 Serial Numbers

1981

—

501Reference

1982

—

1743Reference

1983

—

2482Reference

1984

—

2695Reference

1985

—

3068Reference

Location:

—

Serial number plate on the right side of the tractor frame, ahead of the rear axle.Reference

Electrical

Ground

—

negativeReference

Battery volts

—

12Reference

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.