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 White 4-225
Image not recorded
WhiteModel B
White 4-225
Utility
- power
- 225 hp
- displacement
- 636 ci
- Cylinders
- 8
- Forward gears
- 18
Allis ChalmersAllis Chalmers HD21
vs
WhiteWhite 4-225
How they compare
Headline specs vs. the whole Agricultural
Engine Power
= Effectively tiedHD21225 hp
4-225225 hp
Median Agricultural Tractor110 hp
HD21 is in the 84th percentile; 4-225 is in the 84th · 1,028 models
Engine Displacement
▲ HD21 higher · +208 ci (+33%)HD21844 ci
4-225636 ci
Median Agricultural Tractor336 ci
HD21 is in the 96th percentile; 4-225 is in the 94th · 1,083 models
Cylinders
▲ 4-225 higher · +2 (+33%)HD216
4-2258
Median Agricultural Tractor5.5
HD21 is in the 74th percentile; 4-225 is in the 99th · 1,130 models
Forward Gears
▲ 4-225 higher · +16 (+800%)HD212
4-22518
Median Agricultural Tractor16
HD21 is in the 1st percentile; 4-225 is in the 68th · 972 models
HD21 (A)4-225 (B)Median Agricultural Tractor
Full comparison
Every spec, side by side
General Information
| Spec | Allis Chalmers HD21 | White 4-225 | Difference |
|---|---|---|---|
| Manufacturer | Allis Chalmers | White | — |
| Model | HD21 | 4-225 | — |
| Category | Agricultural | Utility | — |
Engine
| Spec | Allis Chalmers HD21 | White 4-225 | Difference |
|---|---|---|---|
| Manufacturer | Allis-Chalmers | Caterpillar | — |
| Model | Not recorded | 3208T | — |
| Power Output | 225hp | 225hp | Same |
| Rated RPM | 1,800RPM | 2,600RPM | ▲ 4-225+800 RPM · +44% |
| Cylinders | 6 | 8 | ▲ 4-225+2 · +33% |
| Displacement | 844ci | 636ci | ▲ HD21+208 ci · +33% |
| Bore | 5.3in | 4.5in | ▲ HD21+0.8 in · +18% |
| Stroke | 6.5in | 5in | ▲ HD21+1.5 in · +30% |
Transmission
| Spec | Allis Chalmers HD21 | White 4-225 | Difference |
|---|---|---|---|
| Type | Torque Converter | partial powershift | — |
Dimensions & Weight
| Spec | Allis Chalmers HD21 | White 4-225 | Difference |
|---|---|---|---|
| Length | 198in | 244in | ▲ 4-225+46 in · +23% |
| Width | Not recorded | 116in | — |
| Height | 99in | 123in | ▲ 4-225+24 in · +24% |
| Operating Weight | 45,500lb | 23,700lb | ▲ HD21+21,800 lb · +92% |
Hydraulics
| Spec | Allis Chalmers HD21 | White 4-225 | Difference |
|---|---|---|---|
| System Type | Not recorded | closed center | — |
| Steering Type | Not recorded | hydrostatic power | — |
Hitch & Towing
| Spec | Allis Chalmers HD21 | White 4-225 | Difference |
|---|---|---|---|
| Hitch Type | Not recorded | Three-Point Hitch | — |
| Hitch Category | Not recorded | III | — |
Chassis & Drive
| Spec | Allis Chalmers HD21 | White 4-225 | Difference |
|---|---|---|---|
| Chassis Type | Not recorded | 4x4 articulated 4WD | — |
| Drive Type | Not recorded | 4WD | — |
| Steering Type | Not recorded | hydrostatic power | — |
Electrical
| Spec | Allis Chalmers HD21 | White 4-225 | Difference |
|---|---|---|---|
| Battery Voltage | Not recorded | 12V | — |
| Starter Type | Electric | Electric | Same |
Capacities
| Spec | Allis Chalmers HD21 | White 4-225 | Difference |
|---|---|---|---|
| Coolant | 20gal | 11gal | ▲ HD21+9 gal · +82% |
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 · 94th percentile (636 ci)
Cylinders
median 5.5A · 74th percentile (6)B · 99th percentile (8)
Forward Gears
median 16A · 1st percentile (2)B · 68th percentile (18)
Operating Weight
median 10,914 lbA · 99th percentile (45,500 lb)B · 90th percentile (23,700 lb)
A · HD21B · 4-225Median Agricultural Tractor