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Allis ChalmersModel A
Allis Chalmers HD19
Crawler
- power
- Not recorded
- displacement
- 426 ci
- Cylinders
- 6
- Forward gears
- 2
Head to head · Crawler
Allis Chalmers HD19 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 HD19
vs
Allis ChalmersAllis Chalmers HD20
How they compare
Headline specs vs. the whole Crawler
Engine Displacement
▲ HD20 higher · +234 ci (+55%)HD19426 ci
HD20660 ci
Median Crawler Tractor468 ci
HD19 is in the 48th percentile; HD20 is in the 71st · 191 models
Cylinders
= Effectively tiedHD196
HD206
Median Crawler Tractor6
HD19 is in the 50th percentile; HD20 is in the 50th · 192 models
Forward Gears
= Effectively tiedHD192
HD202
Median Crawler Tractor10
HD19 is in the 2nd percentile; HD20 is in the 2nd · 179 models
Operating Weight
▲ HD20 higher · +605 lb (+1%)HD1940,395 lb
HD2041,000 lb
Median Crawler Tractor23,320 lb
HD19 is in the 79th percentile; HD20 is in the 80th · 173 models
HD19 (A)HD20 (B)Median Crawler Tractor
Full comparison
Every spec, side by side
General Information
| Spec | Allis Chalmers HD19 | Allis Chalmers HD20 | Difference |
|---|---|---|---|
| Manufacturer | Allis Chalmers | Allis Chalmers | Same |
| Model | HD19 | HD20 | — |
| Category | Crawler | Industrial | — |
Engine
| Spec | Allis Chalmers HD19 | Allis Chalmers HD20 | Difference |
|---|---|---|---|
| Manufacturer | General Motors | General Motors | Same |
| Rated RPM | 1,750RPM | 1,700RPM | ▲ HD19+50 RPM · +3% |
| 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 HD19 | Allis Chalmers HD20 | Difference |
|---|---|---|---|
| Type | Torque Converter | Torque converter | Same |
Dimensions & Weight
| Spec | Allis Chalmers HD19 | Allis Chalmers HD20 | Difference |
|---|---|---|---|
| Length | 191in | 191in | Same |
| Width | 109in | Not recorded | — |
| Height | 89in | 95in | ▲ HD20+6 in · +7% |
| Operating Weight | 40,395lb | 41,000lb | ▲ HD20+605 lb · +1% |
Chassis & Drive
| Spec | Allis Chalmers HD19 | Allis Chalmers HD20 | Difference |
|---|---|---|---|
| Chassis Type | Track | Not recorded | — |
| Drive Type | Track Drive | Not recorded | — |
Electrical
| Spec | Allis Chalmers HD19 | Allis Chalmers HD20 | Difference |
|---|---|---|---|
| Starter Type | Electric Starter | 24 volts | — |
Capacities
| Spec | Allis Chalmers HD19 | Allis Chalmers HD20 | Difference |
|---|---|---|---|
| Coolant | 11gal | 15gal | ▲ HD20+4 gal · +36% |
Category context
Both models against the field
Engine Displacement
median 468 ciA · 48th percentile (426 ci)B · 71st percentile (660 ci)
Cylinders
median 6A · 50th percentile (6)B · 50th percentile (6)
Forward Gears
median 10A · 2nd percentile (2)B · 2nd percentile (2)
Operating Weight
median 23,320 lbA · 79th percentile (40,395 lb)B · 80th percentile (41,000 lb)
Length
median 146 inA · 64th percentile (191 in)B · 64th percentile (191 in)
A · HD19B · HD20Median Crawler Tractor