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International Harvester I-9 vs Le Roi 105 Tractair

Verdict: International Harvester I-9 vs Le Roi 105 Tractair

The International Harvester I-9 and the Le Roi 105 Tractair are both industrial tractors — here is how they stack up on the figures that matter. Both are rated at the same 35 hp. Le Roi 105 Tractair is the lighter machine (1,542 kg vs 2,914 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. International Harvester I-9 holds more fuel (136.3 L vs 64.3 L) for longer stints between fills. Le Roi 105 Tractair is the newer design (1945 vs 1941). Use the full side-by-side spec tables below to weigh the details against your own operation, and confirm with a dealer demo.

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Fit & specs
International Harvester I-9 Industrial Tractor
International Harvester
62
Fit score
Best match
Clear
Le Roi 105 Tractair Industrial Tractor
Le Roi
62
Fit score
Best match
Clear
Rated power
35 hp
35 hp
Confidence
40%
40%
Guide price
Overview
Manufacturer
International HarvesterReference
Le RoiReference
The gasoline engine was standard on the I-9, and an option on the W-9 until 1947, when it became the standard engine.Reference
liquid-cooledReference
Total built
67,418Reference
Original price
$3,300Reference
Steering
worm-type gearReference
Variants
I-9
gasReference
ID-9
dieselReference
W-9
farm tractorReference
Engine
Fuel tank
136.3 LReference
64.3 LReference
Aux. fuel
3.3 LReference
Drawbar (claimed)
26.1 kWReference
Belt (claimed)
33.6 kWReference
Displacement
5.5 LReference
3.7 LReference
Bore/Stroke
112 x 140 mmReference
102 x 108 mmReference
Compression
5.4:1Reference
5.85:1Reference
Rated RPM
1500Reference
1100Reference
Coolant capacity
37.9 LReference
26.5 LReference
Engine
26.1 kWReference
Power
26.1 kWReference
Air cleaner
oil bathReference
Firing order
1-2-4-3Reference
Starter
electricReference
Starter volts
6Reference
Point gap
0.381 mmReference
Intake valve clearance
0.305 mmReference
Exhaust valve clearance
0.305 mmReference
Oil capacity
6.6 LReference
Oil change
120 hReference
Transmission
Type
sliding gearReference
gearReference
Gears
5 forward and 1 reverseReference
4 forward and 1 reverseReference
Dimensions
Weight
2914 kgReference
1542 kgReference
Ag front
7.50-18Reference
Ag rear
14-32Reference
Length
340 cmReference
304 cmReference
Width
173 cmReference
147 cmReference
Height
167 cmReference
134 cmReference
Front tire
6.00-16Reference
Rear tire
10-24Reference
Industrial front
6.00-16Reference
Industrial rear
10-24Reference
Rear tread
121/132/142/152 cmReference
I-9 Serial Numbers
1940
501Reference
1941
578Reference
1942
3003Reference
1943
3651Reference
1944
5501Reference
1945
11459Reference
1946
17294Reference
1947
22715Reference
1948
29207Reference
1949
36159Reference
1950
45551Reference
1951
51739Reference
1952
59407Reference
1953
64014Reference
1954
67969Reference
Le Roi 105 Tractair attachments
105 Tractair Serial Numbers
Location:
Serial number plate attached to the 105's engine.Reference
Electrical
Charging system
generatorReference
Battery volts
6Reference

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.

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