Allis ChalmersModel A
Allis Chalmers HD21
Agricultural
- power
- 225 hp
- displacement
- 844 ci
- Cylinders
- 6
- Forward gears
- 2
Head to head · Agricultural
Allis Chalmers HD21 vs John Deere 7225J
Image not recorded
John DeereModel B
John Deere 7225J
Row Crop
- power
- 225 hp
- displacement
- 414 ci
- Cylinders
- 6
- Forward gears
- 16
Allis ChalmersAllis Chalmers HD21
vs
John DeereJohn Deere 7225J
How they compare
Headline specs vs. the whole Agricultural
Engine Power
= Effectively tiedHD21225 hp
7225J225 hp
Median Agricultural Tractor110 hp
HD21 is in the 84th percentile; 7225J is in the 84th · 1,028 models
Engine Displacement
▲ HD21 higher · +430 ci (+104%)HD21844 ci
7225J414 ci
Median Agricultural Tractor336 ci
HD21 is in the 96th percentile; 7225J is in the 70th · 1,083 models
Cylinders
= Effectively tiedHD216
7225J6
Median Agricultural Tractor5.5
HD21 is in the 74th percentile; 7225J is in the 74th · 1,130 models
Forward Gears
▲ 7225J higher · +14 (+700%)HD212
7225J16
Median Agricultural Tractor16
HD21 is in the 1st percentile; 7225J is in the 50th · 972 models
HD21 (A)7225J (B)Median Agricultural Tractor
Full comparison
Every spec, side by side
General Information
| Spec | Allis Chalmers HD21 | John Deere 7225J | Difference |
|---|---|---|---|
| Manufacturer | Allis Chalmers | John Deere | — |
| Model | HD21 | 7225J | — |
| Category | Agricultural | Row Crop | — |
Engine
| Spec | Allis Chalmers HD21 | John Deere 7225J | Difference |
|---|---|---|---|
| Manufacturer | Allis-Chalmers | John Deere | — |
| Model | Not recorded | 6068 Powertech | — |
| Power Output | 225hp | 225hp | Same |
| Rated RPM | 1,800RPM | 2,100RPM | ▲ 7225J+300 RPM · +17% |
| Cylinders | 6 | 6 | Same |
| Displacement | 844ci | 414ci | ▲ HD21+430 ci · +104% |
| Bore | 5.3in | 4.2in | ▲ HD21+1.1 in · +26% |
| Stroke | 6.5in | 5in | ▲ HD21+1.5 in · +30% |
Transmission
| Spec | Allis Chalmers HD21 | John Deere 7225J | Difference |
|---|---|---|---|
| Type | Torque Converter | Partial power shift | — |
Dimensions & Weight
| Spec | Allis Chalmers HD21 | John Deere 7225J | Difference |
|---|---|---|---|
| Length | 198in | 240in | ▲ 7225J+42 in · +21% |
| Height | 99in | 124in | ▲ 7225J+25 in · +25% |
| Operating Weight | 45,500lb | 17,860lb | ▲ HD21+27,640 lb · +155% |
Hydraulics
| Spec | Allis Chalmers HD21 | John Deere 7225J | Difference |
|---|---|---|---|
| System Type | Not recorded | Closed center | — |
| Steering Type | Not recorded | Hydrostatic power | — |
Hitch & Towing
| Spec | Allis Chalmers HD21 | John Deere 7225J | Difference |
|---|---|---|---|
| Hitch Category | Not recorded | 3/3N | — |
Chassis & Drive
| Spec | Allis Chalmers HD21 | John Deere 7225J | Difference |
|---|---|---|---|
| Chassis Type | Not recorded | 4x4 MFWD 4WD | — |
| Drive Type | Not recorded | 4WD | — |
| Steering Type | Not recorded | Hydrostatic power | — |
Electrical
| Spec | Allis Chalmers HD21 | John Deere 7225J | Difference |
|---|---|---|---|
| Starter Type | Electric | 12 volt | — |
Capacities
| Spec | Allis Chalmers HD21 | John Deere 7225J | Difference |
|---|---|---|---|
| Coolant | 20gal | Not recorded | — |
Operator Station
| Spec | Allis Chalmers HD21 | John Deere 7225J | Difference |
|---|---|---|---|
| Type | Not recorded | Cab | — |
Category context
Both models against the field
Engine Power
median 110 hpA · 84th percentile (225 hp)B · 84th percentile (225 hp)
Engine Displacement
median 336 ciA · 96th percentile (844 ci)B · 70th percentile (414 ci)
Cylinders
median 5.5A · 74th percentile (6)B · 74th percentile (6)
Forward Gears
median 16A · 1st percentile (2)B · 50th percentile (16)
Operating Weight
median 10,914 lbA · 99th percentile (45,500 lb)B · 78th percentile (17,860 lb)
A · HD21B · 7225JMedian Agricultural Tractor