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
Allis Chalmers D21 Series II vs Deutz-Fahr 638
Image not recorded
Deutz-FahrModel B
Deutz-Fahr 638
Agricultural
- power
- 125 hp
- displacement
- Not recorded
- Cylinders
- Not recorded
- Forward gears
- Not recorded
Allis ChalmersAllis Chalmers D21 Series II
vs
Deutz-FahrDeutz-Fahr 638
How they compare
Headline specs vs. the whole Row Crop
Engine Power
▲ 638 higher · +4 hp (+3%)D21 Series II121 hp
638125 hp
Median Row Crop Tractor138 hp
D21 Series II is in the 40th percentile; 638 is in the 42nd · 1,206 models
D21 Series II (A)638 (B)Median Row Crop Tractor
Full comparison
Every spec, side by side
General Information
| Spec | Allis Chalmers D21 Series II | Deutz-Fahr 638 | Difference |
|---|---|---|---|
| Manufacturer | Allis Chalmers | Deutz-Fahr | — |
| Model | D21 Series II | 638 | — |
| Category | Row Crop | Agricultural | — |
Engine
| Spec | Allis Chalmers D21 Series II | Deutz-Fahr 638 | Difference |
|---|---|---|---|
| Manufacturer | Allis Chalmers | Not recorded | — |
| Model | 3500 | Not recorded | — |
| Power Output | 121hp | 125hp | ▲ 638+4 hp · +3% |
| Rated RPM | 2,200RPM | Not recorded | — |
| Cylinders | 6 | Not recorded | — |
| Displacement | 426ci | Not recorded | — |
| Bore | 4.3in | Not recorded | — |
| Stroke | 5in | Not recorded | — |
Transmission
| Spec | Allis Chalmers D21 Series II | Deutz-Fahr 638 | Difference |
|---|---|---|---|
| Type | Sliding gear with dry disc clutch | Not recorded | — |
Dimensions & Weight
| Spec | Allis Chalmers D21 Series II | Deutz-Fahr 638 | Difference |
|---|---|---|---|
| Length | 160in | Not recorded | — |
| Width | 91.3in | Not recorded | — |
| Height | 106in | Not recorded | — |
| Operating Weight | 9,502lb | Not recorded | — |
Hydraulics
| Spec | Allis Chalmers D21 Series II | Deutz-Fahr 638 | Difference |
|---|---|---|---|
| Steering Type | Power | Not recorded | — |
Power Take-off (PTO)
| Spec | Allis Chalmers D21 Series II | Deutz-Fahr 638 | Difference |
|---|---|---|---|
| Type | Independent | Not recorded | — |
| Speed 1 | 1,000rpm | Not recorded | — |
Hitch & Towing
| Spec | Allis Chalmers D21 Series II | Deutz-Fahr 638 | Difference |
|---|---|---|---|
| Hitch Type | Three-Point Hitch | Not recorded | — |
| Hitch Category | III/II | Not recorded | — |
| Hitch Position | Rear | Not recorded | — |
Chassis & Drive
| Spec | Allis Chalmers D21 Series II | Deutz-Fahr 638 | Difference |
|---|---|---|---|
| Chassis Type | 4x2 2WD | Not recorded | — |
| Drive Type | 2WD | Not recorded | — |
| Steering Type | Power | Not recorded | — |
| Brake Type | Band actuated disc | Not recorded | — |
Electrical
| Spec | Allis Chalmers D21 Series II | Deutz-Fahr 638 | Difference |
|---|---|---|---|
| Starter Type | Electric | Not recorded | — |
Capacities
| Spec | Allis Chalmers D21 Series II | Deutz-Fahr 638 | Difference |
|---|---|---|---|
| Coolant | 7.8gal | Not recorded | — |
Operator Station
| Spec | Allis Chalmers D21 Series II | Deutz-Fahr 638 | Difference |
|---|---|---|---|
| Type | Open | Not recorded | — |
Category context
Both models against the field
Engine Power
median 138 hpA · 40th percentile (121 hp)B · 42nd percentile (125 hp)
A · D21 Series IIB · 638Median Row Crop Tractor