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Allis ChalmersModel A
Allis Chalmers D21 Series I
Row Crop
- power
- 103 hp
- displacement
- 426 ci
- Cylinders
- 6
- Forward gears
- 8
Head to head · Row Crop
Allis Chalmers D21 Series I vs John Deere 4000
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John DeereModel B
John Deere 4000
Row Crop
- power
- 91.1 hp
- displacement
- 404 ci
- Cylinders
- 6
- Forward gears
- 8
Allis ChalmersAllis Chalmers D21 Series I
vs
John DeereJohn Deere 4000
How they compare
Headline specs vs. the whole Row Crop
Engine Power
▲ D21 Series I higher · +11.9 hp (+13%)D21 Series I103 hp
400091.1 hp
Median Row Crop Tractor138 hp
D21 Series I is in the 27th percentile; 4000 is in the 19th · 1,206 models
Engine Displacement
▲ D21 Series I higher · +22 ci (+5%)D21 Series I426 ci
4000404 ci
Median Row Crop Tractor391 ci
D21 Series I is in the 72nd percentile; 4000 is in the 57th · 1,409 models
Cylinders
= Effectively tiedD21 Series I6
40006
Median Row Crop Tractor6
D21 Series I is in the 50th percentile; 4000 is in the 50th · 1,417 models
Forward Gears
= Effectively tiedD21 Series I8
40008
Median Row Crop Tractor16
D21 Series I is in the 16th percentile; 4000 is in the 16th · 1,200 models
D21 Series I (A)4000 (B)Median Row Crop Tractor
Full comparison
Every spec, side by side
General Information
| Spec | Allis Chalmers D21 Series I | John Deere 4000 | Difference |
|---|---|---|---|
| Manufacturer | Allis Chalmers | John Deere | — |
| Model | D21 Series I | 4000 | — |
| Category | Row Crop | Row Crop | Same |
Engine
| Spec | Allis Chalmers D21 Series I | John Deere 4000 | Difference |
|---|---|---|---|
| Manufacturer | Allis Chalmers | John Deere | — |
| Model | 3400 | 6.6L 6-cyl diesel | — |
| Power Output | 103hp | 91.1hp | ▲ D21 Series I+11.9 hp · +13% |
| Rated RPM | 2,200RPM | 2,200RPM | Same |
| Cylinders | 6 | 6 | Same |
| Displacement | 426ci | 404ci | ▲ D21 Series I+22 ci · +5% |
| Bore | 4.3in | 4.3in | Same |
| Stroke | 5in | 4.8in | ▲ D21 Series I+0.2 in · +4% |
Transmission
| Spec | Allis Chalmers D21 Series I | John Deere 4000 | Difference |
|---|---|---|---|
| Type | Sliding gear with dry disc clutch | Partial synchronized | — |
Dimensions & Weight
| Spec | Allis Chalmers D21 Series I | John Deere 4000 | Difference |
|---|---|---|---|
| Length | 161in | Not recorded | — |
| Width | 91.6in | Not recorded | — |
| Height | 107in | Not recorded | — |
| Operating Weight | 9,500lb | 8,605lb | ▲ D21 Series I+895 lb · +10% |
Hydraulics
| Spec | Allis Chalmers D21 Series I | John Deere 4000 | Difference |
|---|---|---|---|
| Steering Type | Power | Power | Same |
Power Take-off (PTO)
| Spec | Allis Chalmers D21 Series I | John Deere 4000 | Difference |
|---|---|---|---|
| Type | Independent | Not recorded | — |
| Speed 1 | 1,000rpm | 540rpm | ▲ D21 Series I+460 rpm · +85% |
| Speed 2 | Not recorded | 1,000rpm | — |
Hitch & Towing
| Spec | Allis Chalmers D21 Series I | John Deere 4000 | Difference |
|---|---|---|---|
| Hitch Type | Three-Point Hitch | Three-Point Hitch | Same |
| Hitch Category | III/II | II | — |
| Hitch Position | Rear | Rear | Same |
Chassis & Drive
| Spec | Allis Chalmers D21 Series I | John Deere 4000 | Difference |
|---|---|---|---|
| Chassis Type | 4x2 2WD | 4x2 2WD | Same |
| Drive Type | 2WD | 2WD | Same |
| Steering Type | Power | Power | Same |
| Brake Type | Band actuated disc | Independent hydraulic wet disc | — |
Electrical
| Spec | Allis Chalmers D21 Series I | John Deere 4000 | Difference |
|---|---|---|---|
| Starter Type | Electric | Electric | Same |
Capacities
| Spec | Allis Chalmers D21 Series I | John Deere 4000 | Difference |
|---|---|---|---|
| Coolant | 5.3gal | Not recorded | — |
Operator Station
| Spec | Allis Chalmers D21 Series I | John Deere 4000 | Difference |
|---|---|---|---|
| Type | Open | Open operator station | — |
Category context
Both models against the field
Engine Power
median 138 hpA · 27th percentile (103 hp)B · 19th percentile (91.1 hp)
Engine Displacement
median 391 ciA · 72nd percentile (426 ci)B · 57th percentile (404 ci)
Cylinders
median 6A · 50th percentile (6)B · 50th percentile (6)
Forward Gears
median 16A · 16th percentile (8)B · 16th percentile (8)
Operating Weight
median 12,307 lbA · 28th percentile (9,500 lb)B · 23rd percentile (8,605 lb)
A · D21 Series IB · 4000Median Row Crop Tractor