
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; 12011 is in the 39th · 1,206 models
D21 Series II is in the 72nd percentile; 12011 is in the 71st · 1,409 models
D21 Series II is in the 50th percentile; 12011 is in the 50th · 1,417 models
D21 Series II is in the 16th percentile; 12011 is in the 50th · 1,200 models
Full comparison
| Spec | Allis Chalmers D21 Series II | Zetor 12011 | Difference |
|---|---|---|---|
| Manufacturer | Allis Chalmers | Zetor | — |
| Model | D21 Series II | 12011 | — |
| Category | Row Crop | Row Crop | Same |
| Spec | Allis Chalmers D21 Series II | Zetor 12011 | Difference |
|---|---|---|---|
| Manufacturer | Allis Chalmers | Zetor | — |
| Model | 3500 | Z 8601 | — |
| Power Output | 121hp | 120hp | ▲ D21 Series II+1 hp · <1% |
| Rated RPM | 2,200RPM | 2,200RPM | Same |
| Cylinders | 6 | 6 | Same |
| Displacement | 426ci | 418ci | ▲ D21 Series II+8 ci · +2% |
| Bore | 4.3in | 4.3in | Same |
| Stroke | 5in | 4.7in | ▲ D21 Series II+0.3 in · +6% |
| Spec | Allis Chalmers D21 Series II | Zetor 12011 | Difference |
|---|---|---|---|
| Type | Sliding gear with dry disc clutch | Synchro Mesh | — |
| Spec | Allis Chalmers D21 Series II | Zetor 12011 | Difference |
|---|---|---|---|
| Length | 160in | 168in | ▲ 12011+8 in · +5% |
| Width | 91.3in | 77.4in | ▲ D21 Series II+13.9 in · +18% |
| Height | 106in | 98.8in | ▲ D21 Series II+7.2 in · +7% |
| Operating Weight | 9,502lb | 9,039lb | ▲ D21 Series II+463 lb · +5% |
| Spec | Allis Chalmers D21 Series II | Zetor 12011 | Difference |
|---|---|---|---|
| System Type | Not recorded | Open Center | — |
| Steering Type | Power | Not recorded | — |
| Spec | Allis Chalmers D21 Series II | Zetor 12011 | Difference |
|---|---|---|---|
| Type | Independent | Not recorded | — |
| Speed 1 | 1,000rpm | Not recorded | — |
| Spec | Allis Chalmers D21 Series II | Zetor 12011 | Difference |
|---|---|---|---|
| Hitch Type | Three-Point Hitch | Category II | — |
| Hitch Category | III/II | Category 3 | — |
| Hitch Position | Rear | Not recorded | — |
| Spec | Allis Chalmers D21 Series II | Zetor 12011 | Difference |
|---|---|---|---|
| Chassis Type | 4x2 2WD | 4x2 2WD | Same |
| Drive Type | 2WD | 2WD | Same |
| Steering Type | Power | Not recorded | — |
| Brake Type | Band actuated disc | Not recorded | — |
| Spec | Allis Chalmers D21 Series II | Zetor 12011 | Difference |
|---|---|---|---|
| Starter Type | Electric | Not recorded | — |
| Spec | Allis Chalmers D21 Series II | Zetor 12011 | Difference |
|---|---|---|---|
| Coolant | 7.8gal | Not recorded | — |
| Spec | Allis Chalmers D21 Series II | Zetor 12011 | Difference |
|---|---|---|---|
| Type | Open | Cab | — |
Category context