Head to head · Industrial

Allis Chalmers HD20 vs Allis Chalmers HD9

Allis Chalmers HD20 Tractor
Allis ChalmersModel A

Allis Chalmers HD20

Industrial

power
Not recorded
displacement
660 ci
Cylinders
6
Forward gears
2
Full HD20 specs
Image not recorded
Allis ChalmersModel B

Allis Chalmers HD9

Industrial

power
Not recorded
displacement
284 ci
Cylinders
4
Forward gears
6
Full HD9 specs
Allis ChalmersAllis Chalmers HD20
vs
Allis ChalmersAllis Chalmers HD9

How they compare

Headline specs vs. the whole Industrial

n = 38–55

Engine Displacement

▲ HD20 higher · +376 ci (+132%)
HD20660 ci
HD9284 ci
Median Industrial Tractor284 ci

HD20 is in the 76th percentile; HD9 is in the 50th · 53 models

Cylinders

▲ HD20 higher · +2 (+50%)
HD206
HD94
Median Industrial Tractor4

HD20 is in the 88th percentile; HD9 is in the 50th · 55 models

Forward Gears

▲ HD9 higher · +4 (+200%)
HD202
HD96
Median Industrial Tractor5

HD20 is in the 1st percentile; HD9 is in the 65th · 43 models

Operating Weight

▲ HD20 higher · +22,200 lb (+118%)
HD2041,000 lb
HD918,800 lb
Median Industrial Tractor9,127 lb

HD20 is in the 97th percentile; HD9 is in the 70th · 49 models

HD20 (A)HD9 (B)Median Industrial Tractor

Full comparison

Every spec, side by side

General Information

SpecAllis Chalmers HD20Allis Chalmers HD9Difference
ManufacturerAllis ChalmersAllis ChalmersSame
ModelHD20HD9—
CategoryIndustrialIndustrialSame

Engine

SpecAllis Chalmers HD20Allis Chalmers HD9Difference
ManufacturerGeneral MotorsGeneral MotorsSame
Rated RPM1,700RPM1,600RPM▲ HD20+100 RPM · +6%
Cylinders64▲ HD20+2 · +50%
Displacement660ci284ci▲ HD20+376 ci · +132%
Bore5in4.3in▲ HD20+0.7 in · +16%
Stroke5.6in5in▲ HD20+0.6 in · +12%

Transmission

SpecAllis Chalmers HD20Allis Chalmers HD9Difference
TypeTorque converterGear—

Dimensions & Weight

SpecAllis Chalmers HD20Allis Chalmers HD9Difference
Length191in150in▲ HD20+41 in · +27%
WidthNot recorded95.1in—
Height95in73.1in▲ HD20+21.9 in · +30%
Operating Weight41,000lb18,800lb▲ HD20+22,200 lb · +118%

Electrical

SpecAllis Chalmers HD20Allis Chalmers HD9Difference
Starter Type24 voltsElectric—

Capacities

SpecAllis Chalmers HD20Allis Chalmers HD9Difference
Coolant15gal7.3gal▲ HD20+7.7 gal · +105%

Category context

Both models against the field

Engine Displacement

median 284 ci
A · 76th percentile (660 ci)B · 50th percentile (284 ci)

Cylinders

median 4
A · 88th percentile (6)B · 50th percentile (4)

Forward Gears

median 5
A · 1st percentile (2)B · 65th percentile (6)

Operating Weight

median 9,127 lb
A · 97th percentile (41,000 lb)B · 70th percentile (18,800 lb)

Length

median 125 in
A · 86th percentile (191 in)B · 63rd percentile (150 in)
A · HD20B · HD9Median Industrial Tractor
Full spec pageAllis Chalmers HD20Full spec pageAllis Chalmers HD9