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 CaseIH Puma 225
Image not recorded
CaseIHModel B
CaseIH Puma 225
Agricultural
- power
- 225 hp
- displacement
- 411 ci
- Cylinders
- 6
- Forward gears
- Not recorded
Allis ChalmersAllis Chalmers HD21
vs
CaseIHCaseIH Puma 225
How they compare
Headline specs vs. the whole Agricultural
Engine Power
= Effectively tiedHD21225 hp
Puma 225225 hp
Median Agricultural Tractor110 hp
HD21 is in the 84th percentile; Puma 225 is in the 84th · 1,028 models
Engine Displacement
▲ HD21 higher · +433 ci (+105%)HD21844 ci
Puma 225411 ci
Median Agricultural Tractor336 ci
HD21 is in the 96th percentile; Puma 225 is in the 70th · 1,083 models
Cylinders
= Effectively tiedHD216
Puma 2256
Median Agricultural Tractor5.5
HD21 is in the 74th percentile; Puma 225 is in the 74th · 1,130 models
Operating Weight
▲ HD21 higher · +29,000 lb (+176%)HD2145,500 lb
Puma 22516,500 lb
Median Agricultural Tractor10,914 lb
HD21 is in the 99th percentile; Puma 225 is in the 75th · 971 models
HD21 (A)Puma 225 (B)Median Agricultural Tractor
Full comparison
Every spec, side by side
General Information
| Spec | Allis Chalmers HD21 | CaseIH Puma 225 | Difference |
|---|---|---|---|
| Manufacturer | Allis Chalmers | CaseIH | — |
| Model | HD21 | Puma 225 | — |
| Category | Agricultural | Agricultural | Same |
Engine
| Spec | Allis Chalmers HD21 | CaseIH Puma 225 | Difference |
|---|---|---|---|
| Manufacturer | Allis-Chalmers | CDC | — |
| Model | Not recorded | 24-valve | — |
| Power Output | 225hp | 225hp | Same |
| Rated RPM | 1,800RPM | 2,200RPM | ▲ Puma 225+400 RPM · +22% |
| Cylinders | 6 | 6 | Same |
| Displacement | 844ci | 411ci | ▲ HD21+433 ci · +105% |
| Bore | 5.3in | 4.1in | ▲ HD21+1.2 in · +29% |
| Stroke | 6.5in | 5.2in | ▲ HD21+1.3 in · +25% |
Transmission
| Spec | Allis Chalmers HD21 | CaseIH Puma 225 | Difference |
|---|---|---|---|
| Type | Torque Converter | Continuously variable transmission (CVT) | — |
Dimensions & Weight
| Spec | Allis Chalmers HD21 | CaseIH Puma 225 | Difference |
|---|---|---|---|
| Length | 198in | Not recorded | — |
| Height | 99in | 123in | ▲ Puma 225+24 in · +24% |
| Operating Weight | 45,500lb | 16,500lb | ▲ HD21+29,000 lb · +176% |
Hydraulics
| Spec | Allis Chalmers HD21 | CaseIH Puma 225 | Difference |
|---|---|---|---|
| System Type | Not recorded | Pressure flow compensating (PFC) | — |
| Steering Type | Not recorded | Power | — |
Hitch & Towing
| Spec | Allis Chalmers HD21 | CaseIH Puma 225 | Difference |
|---|---|---|---|
| Hitch Category | Not recorded | 2/3N | — |
| Hitch Position | Not recorded | Rear | — |
Chassis & Drive
| Spec | Allis Chalmers HD21 | CaseIH Puma 225 | Difference |
|---|---|---|---|
| Steering Type | Not recorded | Power | — |
Electrical
| Spec | Allis Chalmers HD21 | CaseIH Puma 225 | Difference |
|---|---|---|---|
| Starter Type | Electric | Electric | Same |
Capacities
| Spec | Allis Chalmers HD21 | CaseIH Puma 225 | Difference |
|---|---|---|---|
| Coolant | 20gal | Not recorded | — |
Operator Station
| Spec | Allis Chalmers HD21 | CaseIH Puma 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 (225 hp)
Engine Displacement
median 336 ciA · 96th percentile (844 ci)B · 70th percentile (411 ci)
Cylinders
median 5.5A · 74th percentile (6)B · 74th percentile (6)
Operating Weight
median 10,914 lbA · 99th percentile (45,500 lb)B · 75th percentile (16,500 lb)
Height
median 111 inA · 28th percentile (99 in)B · 81st percentile (123 in)
A · HD21B · Puma 225Median Agricultural Tractor