Head to head · Utility

Allis Chalmers 7580 vs International Harvester 1566

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Allis ChalmersModel A

Allis Chalmers 7580

Utility

power
186 hp
displacement
426 ci
Cylinders
6
Forward gears
20
Full 7580 specs
Image not recorded
International HarvesterModel B

International Harvester 1566

Row Crop

power
183 hp
displacement
436 ci
Cylinders
6
Forward gears
12
Full 1566 specs
Allis ChalmersAllis Chalmers 7580
vs
International HarvesterInternational Harvester 1566

How they compare

Headline specs vs. the whole Utility

n = 3,933–5,720

Engine Power

▲ 7580 higher · +3 hp (+2%)
7580186 hp
1566183 hp
Median Utility Tractor55 hp

7580 is in the 94th percentile; 1566 is in the 94th · 5,383 models

Engine Displacement

▲ 1566 higher · +10 ci (+2%)
7580426 ci
1566436 ci
Median Utility Tractor183 ci

7580 is in the 92nd percentile; 1566 is in the 92nd · 5,580 models

Cylinders

= Effectively tied
75806
15666
Median Utility Tractor4

7580 is in the 93rd percentile; 1566 is in the 93rd · 5,720 models

Forward Gears

▲ 7580 higher · +8 (+67%)
758020
156612
Median Utility Tractor12

7580 is in the 86th percentile; 1566 is in the 50th · 4,941 models

7580 (A)1566 (B)Median Utility Tractor

Full comparison

Every spec, side by side

General Information

SpecAllis Chalmers 7580International Harvester 1566Difference
ManufacturerAllis ChalmersInternational Harvester—
Model75801566—
CategoryUtilityRow Crop—

Engine

SpecAllis Chalmers 7580International Harvester 1566Difference
ManufacturerAllis ChalmersInternational Harvester—
Model3750 Mark IIDT-436—
Power Output186hp183hp▲ 7580+3 hp · +2%
Rated RPM2,550RPM2,600RPM▲ 1566+50 RPM · +2%
Cylinders66Same
Displacement426ci436ci▲ 1566+10 ci · +2%
Bore4.3in4.3inSame
Stroke5in5inSame

Transmission

SpecAllis Chalmers 7580International Harvester 1566Difference
TypePartial power shiftTwo-speed power shift—

Dimensions & Weight

SpecAllis Chalmers 7580International Harvester 1566Difference
Length225in168in▲ 7580+57 in · +34%
Width95.5in112in▲ 1566+16.5 in · +17%
Height150in117in▲ 7580+33 in · +28%
Operating Weight25,000lb13,200lb▲ 7580+11,800 lb · +89%

Hydraulics

SpecAllis Chalmers 7580International Harvester 1566Difference
System TypeClosed centerOpen center—
Steering TypeHydrostatic powerNot recorded—

Power Take-off (PTO)

SpecAllis Chalmers 7580International Harvester 1566Difference
TypeIndependentIndependentSame
Speed 1540rpm1,000rpm▲ 1566+460 rpm · +85%

Tires

SpecAllis Chalmers 7580International Harvester 1566Difference
Front Tire Size23.1-30Not recorded—
Rear Tire Size23.1-30Not recorded—

Hitch & Towing

SpecAllis Chalmers 7580International Harvester 1566Difference
Hitch TypeIIIThree-Point Hitch—
Hitch CategoryCategory 3III/II—
Hitch PositionRearRearSame

Chassis & Drive

SpecAllis Chalmers 7580International Harvester 1566Difference
Chassis Type4x4 articulated 4WD4x2 2WD—
Drive Type4WD2WD—
Steering TypeHydrostatic powerNot recorded—
Brake TypeHydraulic wet discsNot recorded—

Electrical

SpecAllis Chalmers 7580International Harvester 1566Difference
Starter TypeElectricElectricSame

Capacities

SpecAllis Chalmers 7580International Harvester 1566Difference
Coolant9.5gal6.5gal▲ 7580+3 gal · +46%

Operator Station

SpecAllis Chalmers 7580International Harvester 1566Difference
TypeAcousta cabCab—

Category context

Both models against the field

Engine Power

median 55 hp
A · 94th percentile (186 hp)B · 94th percentile (183 hp)

Engine Displacement

median 183 ci
A · 92nd percentile (426 ci)B · 92nd percentile (436 ci)

Cylinders

median 4
A · 93rd percentile (6)B · 93rd percentile (6)

Forward Gears

median 12
A · 86th percentile (20)B · 50th percentile (12)

Operating Weight

median 5,303 lb
A · 96th percentile (25,000 lb)B · 91st percentile (13,200 lb)
A · 7580B · 1566Median Utility Tractor
Full spec pageAllis Chalmers 7580Full spec pageInternational Harvester 1566