Comparing the Allis Chalmers 7580 and the Allis Chalmers HD21

This page provides a detailed comparison of the specifications for the Allis Chalmers 7580 and the Allis Chalmers HD21. Explore key differences and similarities across various aspects, including Power Output, Operating Weight and Cylinders.

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Allis Chalmers HD21 Tractor
Allis Chalmers HD21 Tractor
SpecificationAllis Chalmers 7580Allis Chalmers HD21
General Information
Manufacturer
Allis Chalmers
Allis Chalmers
Model
7580
HD21
Category
Utility
Engine
Manufacturer
Allis Chalmers
Allis-Chalmers
Model
3750 Mark II
Power Output
186.35hp
225hp
Rated RPM
2,550RPM
1,800RPM
Cylinders
6
6
Displacement
426ci
844ci
Bore
4.25in
5.25in
Stroke
5in
6.5in
Transmission
Type
Partial power shift
Torque Converter
Dimensions & Weight
Length
225in
198in
Width
95.5in
Height
150in
99in
Operating Weight
25,000lb
45,500lb
Hydraulics
System Type
Closed center
Steering Type
Hydrostatic power
Hitch & Towing
Hitch Type
III
Hitch Category
Category 3
Hitch Position
Rear
Chassis & Drive
Chassis Type
4x4 articulated 4WD
Drive Type
4WD
Steering Type
Hydrostatic power
Brake Type
Hydraulic wet discs
Electrical
Starter Type
Electric
Electric
Capacities
Coolant
38qts
80qts
Operator Station
Type
Acousta cab