
Allis ChalmersModel A
Allis Chalmers HD20
Industrial
- power
- Not recorded
- displacement
- 660 ci
- Cylinders
- 6
- Forward gears
- 2
Head to head · Industrial

Industrial
Four-Wheel Drive
How they compare
HD20 is in the 76th percentile; 360 is in the 86th · 53 models
HD20 is in the 1st percentile; 360 is in the 96th · 43 models
HD20 is in the 97th percentile; 360 is in the 97th · 49 models
Full comparison
| Spec | Allis Chalmers HD20 | Big Bud 360 | Difference |
|---|---|---|---|
| Manufacturer | Allis Chalmers | Big Bud | — |
| Model | HD20 | 360 | — |
| Category | Industrial | Four-Wheel Drive | — |
| Spec | Allis Chalmers HD20 | Big Bud 360 | Difference |
|---|---|---|---|
| Manufacturer | General Motors | Caterpillar | — |
| Rated RPM | 1,700RPM | Not recorded | — |
| Cylinders | 6 | Not recorded | — |
| Displacement | 660ci | 855ci | ▲ 360+195 ci · +30% |
| Bore | 5in | Not recorded | — |
| Stroke | 5.6in | Not recorded | — |
| Spec | Allis Chalmers HD20 | Big Bud 360 | Difference |
|---|---|---|---|
| Type | Torque converter | Manual | — |
| Spec | Allis Chalmers HD20 | Big Bud 360 | Difference |
|---|---|---|---|
| Length | 191in | Not recorded | — |
| Height | 95in | Not recorded | — |
| Operating Weight | 41,000lb | 40,000lb | ▲ HD20+1,000 lb · +3% |
| Spec | Allis Chalmers HD20 | Big Bud 360 | Difference |
|---|---|---|---|
| Chassis Type | Not recorded | 4x4 4WD | — |
| Drive Type | Not recorded | 4WD | — |
| Spec | Allis Chalmers HD20 | Big Bud 360 | Difference |
|---|---|---|---|
| Starter Type | 24 volts | Not recorded | — |
| Spec | Allis Chalmers HD20 | Big Bud 360 | Difference |
|---|---|---|---|
| Coolant | 15gal | Not recorded | — |
Category context