
Allis ChalmersModel A
Allis Chalmers D21 Series II
Row Crop
- power
- 121 hp
- displacement
- 426 ci
- Cylinders
- 6
- Forward gears
- 8
Head to head · Row Crop

Row Crop
Row Crop
How they compare
D21 Series II is in the 40th percentile; 6150M is in the 42nd · 1,206 models
D21 Series II is in the 72nd percentile; 6150M is in the 66th · 1,409 models
D21 Series II is in the 50th percentile; 6150M is in the 50th · 1,417 models
D21 Series II is in the 16th percentile; 6150M is in the 70th · 1,200 models
Full comparison
| Spec | Allis Chalmers D21 Series II | John Deere 6150M | Difference |
|---|---|---|---|
| Manufacturer | Allis Chalmers | John Deere | — |
| Model | D21 Series II | 6150M | — |
| Category | Row Crop | Row Crop | Same |
| Spec | Allis Chalmers D21 Series II | John Deere 6150M | Difference |
|---|---|---|---|
| Manufacturer | Allis Chalmers | John Deere Power Systems | — |
| Model | 3500 | PowerTech PVX | — |
| Power Output | 121hp | 124hp | ▲ 6150M+3 hp · +2% |
| Rated RPM | 2,200RPM | 2,100RPM | ▲ D21 Series II+100 RPM · +5% |
| Cylinders | 6 | 6 | Same |
| Displacement | 426ci | 414ci | ▲ D21 Series II+12 ci · +3% |
| Bore | 4.3in | 4.2in | ▲ D21 Series II+0.1 in · +2% |
| Stroke | 5in | 5in | Same |
| Spec | Allis Chalmers D21 Series II | John Deere 6150M | Difference |
|---|---|---|---|
| Type | Sliding gear with dry disc clutch | Selective gear fixed ratio with partial (4) range operator controlled power shift | — |
| Spec | Allis Chalmers D21 Series II | John Deere 6150M | Difference |
|---|---|---|---|
| Length | 160in | Not recorded | — |
| Width | 91.3in | Not recorded | — |
| Height | 106in | Not recorded | — |
| Operating Weight | 9,502lb | 14,140lb | ▲ 6150M+4,638 lb · +49% |
| Spec | Allis Chalmers D21 Series II | John Deere 6150M | Difference |
|---|---|---|---|
| System Type | Not recorded | Closed center load sensing pressure and flow compensated | — |
| Steering Type | Power | Hydrostatic power | — |
| Spec | Allis Chalmers D21 Series II | John Deere 6150M | Difference |
|---|---|---|---|
| Type | Independent | Not recorded | — |
| Speed 1 | 1,000rpm | Not recorded | — |
| Spec | Allis Chalmers D21 Series II | John Deere 6150M | Difference |
|---|---|---|---|
| Front Tire Size | Not recorded | 420/85R28 | — |
| Rear Tire Size | Not recorded | 460/85R42 | — |
| Spec | Allis Chalmers D21 Series II | John Deere 6150M | Difference |
|---|---|---|---|
| Hitch Type | Three-Point Hitch | Three-Point Hitch | Same |
| Hitch Category | III/II | III/IIIN | — |
| Hitch Position | Rear | Not recorded | — |
| Hitch Capacity | Not recorded | 14,330lb | — |
| Spec | Allis Chalmers D21 Series II | John Deere 6150M | Difference |
|---|---|---|---|
| Chassis Type | 4x2 2WD | 4WD | — |
| Drive Type | 2WD | 4WD | — |
| Steering Type | Power | Hydrostatic power | — |
| Brake Type | Band actuated disc | Not recorded | — |
| Spec | Allis Chalmers D21 Series II | John Deere 6150M | Difference |
|---|---|---|---|
| Starter Type | Electric | 12 volt electric | — |
| Spec | Allis Chalmers D21 Series II | John Deere 6150M | Difference |
|---|---|---|---|
| Coolant | 7.8gal | 7.3gal | ▲ D21 Series II+0.5 gal · +7% |
| Spec | Allis Chalmers D21 Series II | John Deere 6150M | Difference |
|---|---|---|---|
| Type | Open | Not recorded | — |
Category context