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 Ford 846
Allis ChalmersAllis Chalmers HD21
vs
FordFord 846
How they compare
Headline specs vs. the whole Agricultural
Engine Power
▲ 846 higher · +5 hp (+2%)HD21225 hp
846230 hp
Median Agricultural Tractor110 hp
HD21 is in the 84th percentile; 846 is in the 85th · 1,028 models
Engine Displacement
▲ HD21 higher · +233 ci (+38%)HD21844 ci
846611 ci
Median Agricultural Tractor336 ci
HD21 is in the 96th percentile; 846 is in the 93rd · 1,083 models
Cylinders
= Effectively tiedHD216
8466
Median Agricultural Tractor5.5
HD21 is in the 74th percentile; 846 is in the 74th · 1,130 models
Forward Gears
▲ 846 higher · +13 (+650%)HD212
84615
Median Agricultural Tractor16
HD21 is in the 1st percentile; 846 is in the 44th · 972 models
HD21 (A)846 (B)Median Agricultural Tractor
Full comparison
Every spec, side by side
General Information
| Spec | Allis Chalmers HD21 | Ford 846 | Difference |
|---|---|---|---|
| Manufacturer | Allis Chalmers | Ford | — |
| Model | HD21 | 846 | — |
| Category | Agricultural | Utility | — |
Engine
| Spec | Allis Chalmers HD21 | Ford 846 | Difference |
|---|---|---|---|
| Manufacturer | Allis-Chalmers | Cummins | — |
| Model | Not recorded | L10-A230 | — |
| Power Output | 225hp | 230hp | ▲ 846+5 hp · +2% |
| Rated RPM | 1,800RPM | 2,100RPM | ▲ 846+300 RPM · +17% |
| Cylinders | 6 | 6 | Same |
| Displacement | 844ci | 611ci | ▲ HD21+233 ci · +38% |
| Bore | 5.3in | 4.9in | ▲ HD21+0.4 in · +8% |
| Stroke | 6.5in | 5.4in | ▲ HD21+1.1 in · +20% |
Transmission
| Spec | Allis Chalmers HD21 | Ford 846 | Difference |
|---|---|---|---|
| Type | Torque Converter | Partially synchronized and constant mesh | — |
Dimensions & Weight
| Spec | Allis Chalmers HD21 | Ford 846 | Difference |
|---|---|---|---|
| Length | 198in | 260in | ▲ 846+62 in · +31% |
| Height | 99in | Not recorded | — |
| Operating Weight | 45,500lb | 23,000lb | ▲ HD21+22,500 lb · +98% |
Hydraulics
| Spec | Allis Chalmers HD21 | Ford 846 | Difference |
|---|---|---|---|
| System Type | Not recorded | Closed center load sensing | — |
| Steering Type | Not recorded | Articulated Power | — |
Hitch & Towing
| Spec | Allis Chalmers HD21 | Ford 846 | Difference |
|---|---|---|---|
| Hitch Type | Not recorded | Three-Point Hitch | — |
| Hitch Category | Not recorded | III | — |
| Hitch Position | Not recorded | Rear | — |
Chassis & Drive
| Spec | Allis Chalmers HD21 | Ford 846 | Difference |
|---|---|---|---|
| Chassis Type | Not recorded | 4x4 articulated 4WD | — |
| Drive Type | Not recorded | 4WD | — |
| Steering Type | Not recorded | Articulated Power | — |
Electrical
| Spec | Allis Chalmers HD21 | Ford 846 | Difference |
|---|---|---|---|
| Starter Type | Electric | Electric | Same |
Capacities
| Spec | Allis Chalmers HD21 | Ford 846 | Difference |
|---|---|---|---|
| Coolant | 20gal | 13.8gal | ▲ HD21+6.2 gal · +45% |
Operator Station
| Spec | Allis Chalmers HD21 | Ford 846 | Difference |
|---|---|---|---|
| Type | Not recorded | Cab | — |
Category context
Both models against the field
Engine Power
median 110 hpA · 84th percentile (225 hp)B · 85th percentile (230 hp)
Engine Displacement
median 336 ciA · 96th percentile (844 ci)B · 93rd percentile (611 ci)
Cylinders
median 5.5A · 74th percentile (6)B · 74th percentile (6)
Forward Gears
median 16A · 1st percentile (2)B · 44th percentile (15)
Operating Weight
median 10,914 lbA · 99th percentile (45,500 lb)B · 90th percentile (23,000 lb)
A · HD21B · 846Median Agricultural Tractor