
Allis ChalmersModel A
Allis Chalmers 7020
Row Crop
- power
- 124 hp
- displacement
- 301 ci
- Cylinders
- 6
- Forward gears
- 6
Head to head · Row Crop

Row Crop
Row Crop
How they compare
7020 is in the 41st percentile; 4255 is in the 44th · 1,206 models
7020 is in the 32nd percentile; 4255 is in the 82nd · 1,409 models
7020 is in the 50th percentile; 4255 is in the 50th · 1,417 models
7020 is in the 11th percentile; 4255 is in the 33rd · 1,200 models
Full comparison
| Spec | Allis Chalmers 7020 | John Deere 4255 | Difference |
|---|---|---|---|
| Manufacturer | Allis Chalmers | John Deere | — |
| Model | 7020 | 4255 | — |
| Category | Row Crop | Row Crop | Same |
| Spec | Allis Chalmers 7020 | John Deere 4255 | Difference |
|---|---|---|---|
| Manufacturer | Allis Chalmers | John Deere | — |
| Model | 649I | Not recorded | — |
| Power Output | 124hp | 127hp | ▲ 4255+3 hp · +2% |
| Rated RPM | 2,300RPM | 2,200RPM | ▲ 7020+100 RPM · +5% |
| Cylinders | 6 | 6 | Same |
| Displacement | 301ci | 466ci | ▲ 4255+165 ci · +55% |
| Bore | 3.9in | 4.6in | ▲ 4255+0.7 in · +18% |
| Stroke | 4.3in | 4.8in | ▲ 4255+0.5 in · +12% |
| Spec | Allis Chalmers 7020 | John Deere 4255 | Difference |
|---|---|---|---|
| Type | Partial power shift | Power Shift | — |
| Spec | Allis Chalmers 7020 | John Deere 4255 | Difference |
|---|---|---|---|
| Length | 163in | 159in | ▲ 7020+4 in · +3% |
| Width | 92.6in | 96in | ▲ 4255+3.4 in · +4% |
| Height | 116in | 117in | ▲ 4255+1 in · <1% |
| Operating Weight | 11,770lb | 14,050lb | ▲ 4255+2,280 lb · +19% |
| Spec | Allis Chalmers 7020 | John Deere 4255 | Difference |
|---|---|---|---|
| System Type | Closed center | Closed center | Same |
| Steering Type | Hydrostatic power | Power | — |
| Spec | Allis Chalmers 7020 | John Deere 4255 | Difference |
|---|---|---|---|
| Type | Independent | Independent with hydraulic clutch | — |
| Speed 1 | 540rpm | Not recorded | — |
| Speed 2 | 1,000rpm | Not recorded | — |
| Spec | Allis Chalmers 7020 | John Deere 4255 | Difference |
|---|---|---|---|
| Front Tire Size | 11.00-16 | Not recorded | — |
| Rear Tire Size | 20.8-38 | Not recorded | — |
| Spec | Allis Chalmers 7020 | John Deere 4255 | Difference |
|---|---|---|---|
| Hitch Type | Three-Point Hitch | Not recorded | — |
| Hitch Category | III/II | II | — |
| Hitch Position | Rear | Not recorded | — |
| Hitch Capacity | 6,680lb | 6,175lb | ▲ 7020+505 lb · +8% |
| Spec | Allis Chalmers 7020 | John Deere 4255 | Difference |
|---|---|---|---|
| Chassis Type | 4x2 2WD | Not recorded | — |
| Drive Type | 2WD | Not recorded | — |
| Steering Type | Hydrostatic power | Power | — |
| Brake Type | Differential hydraulic wet disc | Differential hydraulic wet discs | — |
| Spec | Allis Chalmers 7020 | John Deere 4255 | Difference |
|---|---|---|---|
| Starter Type | Electric | Electric | Same |
| Spec | Allis Chalmers 7020 | John Deere 4255 | Difference |
|---|---|---|---|
| Coolant | 6.5gal | 6.8gal | ▲ 4255+0.3 gal · +5% |
| Spec | Allis Chalmers 7020 | John Deere 4255 | Difference |
|---|---|---|---|
| Type | Acousta-Cab | Cab | — |
Category context