
Allis ChalmersModel A
Allis Chalmers HD21
Agricultural
- power
- 225 hp
- displacement
- 844 ci
- Cylinders
- 6
- Forward gears
- 2
Head to head · Agricultural

Agricultural

Four-Wheel Drive
How they compare
HD21 is in the 84th percentile; Bearcat is in the 84th · 1,028 models
HD21 is in the 96th percentile; Bearcat is in the 94th · 1,083 models
HD21 is in the 74th percentile; Bearcat is in the 99th · 1,130 models
HD21 is in the 1st percentile; Bearcat is in the 23rd · 972 models
Full comparison
| Spec | Allis Chalmers HD21 | Steiger Bearcat | Difference |
|---|---|---|---|
| Manufacturer | Allis Chalmers | Steiger | — |
| Model | HD21 | Bearcat | — |
| Category | Agricultural | Four-Wheel Drive | — |
| Spec | Allis Chalmers HD21 | Steiger Bearcat | Difference |
|---|---|---|---|
| Manufacturer | Allis-Chalmers | Caterpillar | — |
| Model | Not recorded | 3160 | — |
| Power Output | 225hp | 225hp | Same |
| Rated RPM | 1,800RPM | Not recorded | — |
| Cylinders | 6 | 8 | ▲ Bearcat+2 · +33% |
| Displacement | 844ci | 636ci | ▲ HD21+208 ci · +33% |
| Bore | 5.3in | 4.5in | ▲ HD21+0.8 in · +18% |
| Stroke | 6.5in | 5in | ▲ HD21+1.5 in · +30% |
| Spec | Allis Chalmers HD21 | Steiger Bearcat | Difference |
|---|---|---|---|
| Type | Torque Converter | Manual | — |
| Spec | Allis Chalmers HD21 | Steiger Bearcat | Difference |
|---|---|---|---|
| Length | 198in | Not recorded | — |
| Height | 99in | Not recorded | — |
| Operating Weight | 45,500lb | 19,600lb | ▲ HD21+25,900 lb · +132% |
| Spec | Allis Chalmers HD21 | Steiger Bearcat | Difference |
|---|---|---|---|
| System Type | Not recorded | Open Center | — |
| Spec | Allis Chalmers HD21 | Steiger Bearcat | Difference |
|---|---|---|---|
| Chassis Type | Not recorded | 4x4 articulated 4WD | — |
| Drive Type | Not recorded | Four-wheel Drive (4WD) | — |
| Spec | Allis Chalmers HD21 | Steiger Bearcat | Difference |
|---|---|---|---|
| Starter Type | Electric | Electric | Same |
| Spec | Allis Chalmers HD21 | Steiger Bearcat | Difference |
|---|---|---|---|
| Coolant | 20gal | Not recorded | — |
Category context