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 Massey Ferguson 8270
Massey FergusonModel B
Massey Ferguson 8270
Agricultural
- power
- 222 hp
- displacement
- 514 ci
- Cylinders
- 6
- Forward gears
- 18
Allis ChalmersAllis Chalmers HD21
vs
Massey FergusonMassey Ferguson 8270
How they compare
Headline specs vs. the whole Agricultural
Engine Power
▲ HD21 higher · +3 hp (+1%)HD21225 hp
8270222 hp
Median Agricultural Tractor110 hp
HD21 is in the 84th percentile; 8270 is in the 84th · 1,028 models
Engine Displacement
▲ HD21 higher · +330 ci (+64%)HD21844 ci
8270514 ci
Median Agricultural Tractor336 ci
HD21 is in the 96th percentile; 8270 is in the 88th · 1,083 models
Cylinders
= Effectively tiedHD216
82706
Median Agricultural Tractor5.5
HD21 is in the 74th percentile; 8270 is in the 74th · 1,130 models
Forward Gears
▲ 8270 higher · +16 (+800%)HD212
827018
Median Agricultural Tractor16
HD21 is in the 1st percentile; 8270 is in the 68th · 972 models
HD21 (A)8270 (B)Median Agricultural Tractor
Full comparison
Every spec, side by side
General Information
| Spec | Allis Chalmers HD21 | Massey Ferguson 8270 | Difference |
|---|---|---|---|
| Manufacturer | Allis Chalmers | Massey Ferguson | — |
| Model | HD21 | 8270 | — |
| Category | Agricultural | Agricultural | Same |
Engine
| Spec | Allis Chalmers HD21 | Massey Ferguson 8270 | Difference |
|---|---|---|---|
| Manufacturer | Allis-Chalmers | Valmet | — |
| Power Output | 225hp | 222hp | ▲ HD21+3 hp · +1% |
| Rated RPM | 1,800RPM | 2,200RPM | ▲ 8270+400 RPM · +22% |
| Cylinders | 6 | 6 | Same |
| Displacement | 844ci | 514ci | ▲ HD21+330 ci · +64% |
| Bore | 5.3in | 4.4in | ▲ HD21+0.9 in · +20% |
| Stroke | 6.5in | 5.7in | ▲ HD21+0.8 in · +14% |
Transmission
| Spec | Allis Chalmers HD21 | Massey Ferguson 8270 | Difference |
|---|---|---|---|
| Type | Torque Converter | Full power shift | — |
Dimensions & Weight
| Spec | Allis Chalmers HD21 | Massey Ferguson 8270 | Difference |
|---|---|---|---|
| Length | 198in | Not recorded | — |
| Height | 99in | Not recorded | — |
| Operating Weight | 45,500lb | 21,595lb | ▲ HD21+23,905 lb · +111% |
Hydraulics
| Spec | Allis Chalmers HD21 | Massey Ferguson 8270 | Difference |
|---|---|---|---|
| System Type | Not recorded | PFC | — |
| Steering Type | Not recorded | Hydrostatic power | — |
Tires
| Spec | Allis Chalmers HD21 | Massey Ferguson 8270 | Difference |
|---|---|---|---|
| Front Tire Size | Not recorded | 16.9R-28 | — |
| Rear Tire Size | Not recorded | 18.4R-42 | — |
Hitch & Towing
| Spec | Allis Chalmers HD21 | Massey Ferguson 8270 | Difference |
|---|---|---|---|
| Hitch Category | Not recorded | III | — |
Chassis & Drive
| Spec | Allis Chalmers HD21 | Massey Ferguson 8270 | Difference |
|---|---|---|---|
| Steering Type | Not recorded | Hydrostatic power | — |
Electrical
| Spec | Allis Chalmers HD21 | Massey Ferguson 8270 | Difference |
|---|---|---|---|
| Starter Type | Electric | 12 volt | — |
Capacities
| Spec | Allis Chalmers HD21 | Massey Ferguson 8270 | Difference |
|---|---|---|---|
| Coolant | 20gal | 8gal | ▲ HD21+12 gal · +150% |
Category context
Both models against the field
Engine Power
median 110 hpA · 84th percentile (225 hp)B · 84th percentile (222 hp)
Engine Displacement
median 336 ciA · 96th percentile (844 ci)B · 88th percentile (514 ci)
Cylinders
median 5.5A · 74th percentile (6)B · 74th percentile (6)
Forward Gears
median 16A · 1st percentile (2)B · 68th percentile (18)
Operating Weight
median 10,914 lbA · 99th percentile (45,500 lb)B · 88th percentile (21,595 lb)
A · HD21B · 8270Median Agricultural Tractor