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

Industrial
Crawler
How they compare
HD20 is in the 76th percentile; 8310RT is in the 71st · 53 models
HD20 is in the 88th percentile; 8310RT is in the 88th · 55 models
HD20 is in the 1st percentile; 8310RT is in the 97th · 43 models
HD20 is in the 97th percentile; 8310RT is in the 96th · 49 models
Full comparison
| Spec | Allis Chalmers HD20 | John Deere 8310RT | Difference |
|---|---|---|---|
| Manufacturer | Allis Chalmers | John Deere | — |
| Model | HD20 | 8310RT | — |
| Category | Industrial | Crawler | — |
| Spec | Allis Chalmers HD20 | John Deere 8310RT | Difference |
|---|---|---|---|
| Manufacturer | General Motors | John Deere | — |
| Model | Not recorded | Six-cylinder vertical with two turbochargers and air-to-air aftercooler | — |
| Rated RPM | 1,700RPM | 2,099RPM | ▲ 8310RT+399 RPM · +23% |
| Cylinders | 6 | 6 | Same |
| Displacement | 660ci | 548ci | ▲ HD20+112 ci · +20% |
| Bore | 5in | 4.7in | ▲ HD20+0.3 in · +6% |
| Stroke | 5.6in | 5.4in | ▲ HD20+0.2 in · +4% |
| Spec | Allis Chalmers HD20 | John Deere 8310RT | Difference |
|---|---|---|---|
| Type | Torque converter | Full power shift with selective gear fixed ratio | — |
| Spec | Allis Chalmers HD20 | John Deere 8310RT | Difference |
|---|---|---|---|
| Length | 191in | 271in | ▲ 8310RT+80 in · +42% |
| Width | Not recorded | 135in | — |
| Height | 95in | 131in | ▲ 8310RT+36 in · +38% |
| Operating Weight | 41,000lb | 34,905lb | ▲ HD20+6,095 lb · +17% |
| Spec | Allis Chalmers HD20 | John Deere 8310RT | Difference |
|---|---|---|---|
| System Type | Not recorded | Hydraulic control system direct engine drive | — |
| Steering Type | Not recorded | Electro-hydraulic power | — |
| Spec | Allis Chalmers HD20 | John Deere 8310RT | Difference |
|---|---|---|---|
| Hitch Type | Not recorded | Type 4N/3 | — |
| Hitch Category | Not recorded | Category 3 | — |
| Hitch Position | Not recorded | Rear | — |
| Spec | Allis Chalmers HD20 | John Deere 8310RT | Difference |
|---|---|---|---|
| Chassis Type | Not recorded | Track | — |
| Drive Type | Not recorded | Track | — |
| Steering Type | Not recorded | Electro-hydraulic power | — |
| Spec | Allis Chalmers HD20 | John Deere 8310RT | Difference |
|---|---|---|---|
| Starter Type | 24 volts | Electric | — |
| Spec | Allis Chalmers HD20 | John Deere 8310RT | Difference |
|---|---|---|---|
| Coolant | 15gal | 10.8gal | ▲ HD20+4.2 gal · +39% |
| Spec | Allis Chalmers HD20 | John Deere 8310RT | Difference |
|---|---|---|---|
| Type | Not recorded | Cab | — |
Category context