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 8S.225
Image not recorded
Massey FergusonModel B
Massey Ferguson 8S.225
Agricultural
- power
- 221 hp
- displacement
- 449 ci
- Cylinders
- 6
- Forward gears
- 28
Allis ChalmersAllis Chalmers HD21
vs
Massey FergusonMassey Ferguson 8S.225
How they compare
Headline specs vs. the whole Agricultural
Engine Power
▲ HD21 higher · +4 hp (+2%)HD21225 hp
8S.225221 hp
Median Agricultural Tractor110 hp
HD21 is in the 84th percentile; 8S.225 is in the 84th · 1,028 models
Engine Displacement
▲ HD21 higher · +395 ci (+88%)HD21844 ci
8S.225449 ci
Median Agricultural Tractor336 ci
HD21 is in the 96th percentile; 8S.225 is in the 80th · 1,083 models
Cylinders
= Effectively tiedHD216
8S.2256
Median Agricultural Tractor5.5
HD21 is in the 74th percentile; 8S.225 is in the 74th · 1,130 models
Forward Gears
▲ 8S.225 higher · +26 (+1300%)HD212
8S.22528
Median Agricultural Tractor16
HD21 is in the 1st percentile; 8S.225 is in the 87th · 972 models
HD21 (A)8S.225 (B)Median Agricultural Tractor
Full comparison
Every spec, side by side
General Information
| Spec | Allis Chalmers HD21 | Massey Ferguson 8S.225 | Difference |
|---|---|---|---|
| Manufacturer | Allis Chalmers | Massey Ferguson | — |
| Model | HD21 | 8S.225 | — |
| Category | Agricultural | Agricultural | Same |
Engine
| Spec | Allis Chalmers HD21 | Massey Ferguson 8S.225 | Difference |
|---|---|---|---|
| Manufacturer | Allis-Chalmers | AGCO Power | — |
| Power Output | 225hp | 221hp | ▲ HD21+4 hp · +2% |
| Rated RPM | 1,800RPM | 1,850RPM | ▲ 8S.225+50 RPM · +3% |
| Cylinders | 6 | 6 | Same |
| Displacement | 844ci | 449ci | ▲ HD21+395 ci · +88% |
| Bore | 5.3in | 4.3in | ▲ HD21+1 in · +23% |
| Stroke | 6.5in | 5.3in | ▲ HD21+1.2 in · +23% |
Transmission
| Spec | Allis Chalmers HD21 | Massey Ferguson 8S.225 | Difference |
|---|---|---|---|
| Type | Torque Converter | Not recorded | — |
Dimensions & Weight
| Spec | Allis Chalmers HD21 | Massey Ferguson 8S.225 | Difference |
|---|---|---|---|
| Length | 198in | 212in | ▲ 8S.225+14 in · +7% |
| Height | 99in | 134in | ▲ 8S.225+35 in · +35% |
| Operating Weight | 45,500lb | 22,046lb | ▲ HD21+23,454 lb · +106% |
Hydraulics
| Spec | Allis Chalmers HD21 | Massey Ferguson 8S.225 | Difference |
|---|---|---|---|
| System Type | Not recorded | Closed center load-sensing | — |
Hitch & Towing
| Spec | Allis Chalmers HD21 | Massey Ferguson 8S.225 | Difference |
|---|---|---|---|
| Hitch Category | Not recorded | III | — |
Electrical
| Spec | Allis Chalmers HD21 | Massey Ferguson 8S.225 | Difference |
|---|---|---|---|
| Starter Type | Electric | Electric | Same |
Capacities
| Spec | Allis Chalmers HD21 | Massey Ferguson 8S.225 | Difference |
|---|---|---|---|
| Coolant | 20gal | Not recorded | — |
Operator Station
| Spec | Allis Chalmers HD21 | Massey Ferguson 8S.225 | Difference |
|---|---|---|---|
| Type | Not recorded | Cab | — |
Category context
Both models against the field
Engine Power
median 110 hpA · 84th percentile (225 hp)B · 84th percentile (221 hp)
Engine Displacement
median 336 ciA · 96th percentile (844 ci)B · 80th percentile (449 ci)
Cylinders
median 5.5A · 74th percentile (6)B · 74th percentile (6)
Forward Gears
median 16A · 1st percentile (2)B · 87th percentile (28)
Operating Weight
median 10,914 lbA · 99th percentile (45,500 lb)B · 88th percentile (22,046 lb)
A · HD21B · 8S.225Median Agricultural Tractor