Allis ChalmersModel A
Allis Chalmers HD21
Agricultural
- power
- 225 hp
- displacement
- 844 ci
- Cylinders
- 6
- Forward gears
- 2
Head to head · Agricultural
Allis Chalmers HD21 vs Allis Chalmers HD5
Allis ChalmersModel B
Allis Chalmers HD5
Crawler
- power
- Not recorded
- displacement
- 142 ci
- Cylinders
- 2
- Forward gears
- 5
Allis ChalmersAllis Chalmers HD21
vs
Allis ChalmersAllis Chalmers HD5
How they compare
Headline specs vs. the whole Agricultural
Engine Displacement
▲ HD21 higher · +702 ci (+494%)HD21844 ci
HD5142 ci
Median Agricultural Tractor336 ci
HD21 is in the 96th percentile; HD5 is in the 4th · 1,083 models
Cylinders
▲ HD21 higher · +4 (+200%)HD216
HD52
Median Agricultural Tractor5.5
HD21 is in the 74th percentile; HD5 is in the 3rd · 1,130 models
Forward Gears
▲ HD5 higher · +3 (+150%)HD212
HD55
Median Agricultural Tractor16
HD21 is in the 1st percentile; HD5 is in the 7th · 972 models
Operating Weight
▲ HD21 higher · +35,000 lb (+333%)HD2145,500 lb
HD510,500 lb
Median Agricultural Tractor10,914 lb
HD21 is in the 99th percentile; HD5 is in the 48th · 971 models
HD21 (A)HD5 (B)Median Agricultural Tractor
Full comparison
Every spec, side by side
General Information
| Spec | Allis Chalmers HD21 | Allis Chalmers HD5 | Difference |
|---|---|---|---|
| Manufacturer | Allis Chalmers | Allis Chalmers | Same |
| Model | HD21 | HD5 | — |
| Category | Agricultural | Crawler, Agricultural | — |
Engine
| Spec | Allis Chalmers HD21 | Allis Chalmers HD5 | Difference |
|---|---|---|---|
| Manufacturer | Allis-Chalmers | General Motors | — |
| Power Output | 225hp | Not recorded | — |
| Rated RPM | 1,800RPM | 1,800RPM | Same |
| Cylinders | 6 | 2 | ▲ HD21+4 · +200% |
| Displacement | 844ci | 142ci | ▲ HD21+702 ci · +494% |
| Bore | 5.3in | 4.3in | ▲ HD21+1 in · +23% |
| Stroke | 6.5in | 5in | ▲ HD21+1.5 in · +30% |
Transmission
| Spec | Allis Chalmers HD21 | Allis Chalmers HD5 | Difference |
|---|---|---|---|
| Type | Torque Converter | Sliding Gear | — |
Dimensions & Weight
| Spec | Allis Chalmers HD21 | Allis Chalmers HD5 | Difference |
|---|---|---|---|
| Length | 198in | 125in | ▲ HD21+73 in · +58% |
| Width | Not recorded | 62.5in | — |
| Height | 99in | 60.4in | ▲ HD21+38.6 in · +64% |
| Operating Weight | 45,500lb | 10,500lb | ▲ HD21+35,000 lb · +333% |
Chassis & Drive
| Spec | Allis Chalmers HD21 | Allis Chalmers HD5 | Difference |
|---|---|---|---|
| Chassis Type | Not recorded | Crawler | — |
Electrical
| Spec | Allis Chalmers HD21 | Allis Chalmers HD5 | Difference |
|---|---|---|---|
| Starter Type | Electric | Electric | Same |
Capacities
| Spec | Allis Chalmers HD21 | Allis Chalmers HD5 | Difference |
|---|---|---|---|
| Coolant | 20gal | 3.8gal | ▲ HD21+16.2 gal · +426% |
Operator Station
| Spec | Allis Chalmers HD21 | Allis Chalmers HD5 | Difference |
|---|---|---|---|
| Type | Not recorded | Open Operator Station | — |
Category context
Both models against the field
Engine Displacement
median 336 ciA · 96th percentile (844 ci)B · 4th percentile (142 ci)
Cylinders
median 5.5A · 74th percentile (6)B · 3rd percentile (2)
Forward Gears
median 16A · 1st percentile (2)B · 7th percentile (5)
Operating Weight
median 10,914 lbA · 99th percentile (45,500 lb)B · 48th percentile (10,500 lb)
Length
median 173 inA · 77th percentile (198 in)B · 9th percentile (125 in)
A · HD21B · HD5Median Agricultural Tractor