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Allis ChalmersModel A
Allis Chalmers HD15
Industrial
- power
- Not recorded
- displacement
- 426 ci
- Cylinders
- 6
- Forward gears
- 6
Head to head · Industrial
Allis Chalmers HD15 vs Allis Chalmers HD20
Allis ChalmersModel B
Allis Chalmers HD20
Industrial
- power
- Not recorded
- displacement
- 660 ci
- Cylinders
- 6
- Forward gears
- 2
Allis ChalmersAllis Chalmers HD15
vs
Allis ChalmersAllis Chalmers HD20
How they compare
Headline specs vs. the whole Industrial
Engine Displacement
▲ HD20 higher · +234 ci (+55%)HD15426 ci
HD20660 ci
Median Industrial Tractor284 ci
HD15 is in the 65th percentile; HD20 is in the 76th · 53 models
Cylinders
= Effectively tiedHD156
HD206
Median Industrial Tractor4
HD15 is in the 88th percentile; HD20 is in the 88th · 55 models
Forward Gears
▲ HD15 higher · +4 (+200%)HD156
HD202
Median Industrial Tractor5
HD15 is in the 65th percentile; HD20 is in the 1st · 43 models
Operating Weight
▲ HD20 higher · +10,105 lb (+33%)HD1530,895 lb
HD2041,000 lb
Median Industrial Tractor9,127 lb
HD15 is in the 89th percentile; HD20 is in the 97th · 49 models
HD15 (A)HD20 (B)Median Industrial Tractor
Full comparison
Every spec, side by side
General Information
| Spec | Allis Chalmers HD15 | Allis Chalmers HD20 | Difference |
|---|---|---|---|
| Manufacturer | Allis Chalmers | Allis Chalmers | Same |
| Model | HD15 | HD20 | — |
| Category | Industrial | Industrial | Same |
Engine
| Spec | Allis Chalmers HD15 | Allis Chalmers HD20 | Difference |
|---|---|---|---|
| Manufacturer | General Motors | General Motors | Same |
| Rated RPM | 1,600RPM | 1,700RPM | ▲ HD20+100 RPM · +6% |
| Cylinders | 6 | 6 | Same |
| Displacement | 426ci | 660ci | ▲ HD20+234 ci · +55% |
| Bore | 4.3in | 5in | ▲ HD20+0.7 in · +16% |
| Stroke | 5in | 5.6in | ▲ HD20+0.6 in · +12% |
Transmission
| Spec | Allis Chalmers HD15 | Allis Chalmers HD20 | Difference |
|---|---|---|---|
| Type | Constant Mesh | Torque converter | — |
Dimensions & Weight
| Spec | Allis Chalmers HD15 | Allis Chalmers HD20 | Difference |
|---|---|---|---|
| Length | 181in | 191in | ▲ HD20+10 in · +6% |
| Width | 96.8in | Not recorded | — |
| Height | 95in | 95in | Same |
| Operating Weight | 30,895lb | 41,000lb | ▲ HD20+10,105 lb · +33% |
Hydraulics
| Spec | Allis Chalmers HD15 | Allis Chalmers HD20 | Difference |
|---|---|---|---|
| Steering Type | Hydraulic | Not recorded | — |
Chassis & Drive
| Spec | Allis Chalmers HD15 | Allis Chalmers HD20 | Difference |
|---|---|---|---|
| Steering Type | Hydraulic | Not recorded | — |
Electrical
| Spec | Allis Chalmers HD15 | Allis Chalmers HD20 | Difference |
|---|---|---|---|
| Starter Type | Electric Starter | 24 volts | — |
Capacities
| Spec | Allis Chalmers HD15 | Allis Chalmers HD20 | Difference |
|---|---|---|---|
| Coolant | 11.8gal | 15gal | ▲ HD20+3.2 gal · +27% |
Category context
Both models against the field
Engine Displacement
median 284 ciA · 65th percentile (426 ci)B · 76th percentile (660 ci)
Cylinders
median 4A · 88th percentile (6)B · 88th percentile (6)
Forward Gears
median 5A · 65th percentile (6)B · 1st percentile (2)
Operating Weight
median 9,127 lbA · 89th percentile (30,895 lb)B · 97th percentile (41,000 lb)
Length
median 125 inA · 73rd percentile (181 in)B · 86th percentile (191 in)
A · HD15B · HD20Median Industrial Tractor