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 John Deere 6R 230
Image not recorded
John DeereModel B
John Deere 6R 230
Agricultural
- power
- 227 hp
- displacement
- 415 ci
- Cylinders
- 6
- Forward gears
- Not recorded
Allis ChalmersAllis Chalmers HD21
vs
John DeereJohn Deere 6R 230
How they compare
Headline specs vs. the whole Agricultural
Engine Power
▲ 6R 230 higher · +2 hp (<1%)HD21225 hp
6R 230227 hp
Median Agricultural Tractor110 hp
HD21 is in the 84th percentile; 6R 230 is in the 85th · 1,028 models
Engine Displacement
▲ HD21 higher · +429 ci (+103%)HD21844 ci
6R 230415 ci
Median Agricultural Tractor336 ci
HD21 is in the 96th percentile; 6R 230 is in the 72nd · 1,083 models
Cylinders
= Effectively tiedHD216
6R 2306
Median Agricultural Tractor5.5
HD21 is in the 74th percentile; 6R 230 is in the 74th · 1,130 models
Operating Weight
▲ HD21 higher · +24,997 lb (+122%)HD2145,500 lb
6R 23020,503 lb
Median Agricultural Tractor10,914 lb
HD21 is in the 99th percentile; 6R 230 is in the 86th · 971 models
HD21 (A)6R 230 (B)Median Agricultural Tractor
Full comparison
Every spec, side by side
General Information
| Spec | Allis Chalmers HD21 | John Deere 6R 230 | Difference |
|---|---|---|---|
| Manufacturer | Allis Chalmers | John Deere | — |
| Model | HD21 | 6R 230 | — |
| Category | Agricultural | Agricultural | Same |
Engine
| Spec | Allis Chalmers HD21 | John Deere 6R 230 | Difference |
|---|---|---|---|
| Manufacturer | Allis-Chalmers | John Deere | — |
| Model | Not recorded | PowerTech PVS | — |
| Power Output | 225hp | 227hp | ▲ 6R 230+2 hp · <1% |
| Rated RPM | 1,800RPM | 2,100RPM | ▲ 6R 230+300 RPM · +17% |
| Cylinders | 6 | 6 | Same |
| Displacement | 844ci | 415ci | ▲ HD21+429 ci · +103% |
| Bore | 5.3in | 4.2in | ▲ HD21+1.1 in · +26% |
| Stroke | 6.5in | 5in | ▲ HD21+1.5 in · +30% |
Transmission
| Spec | Allis Chalmers HD21 | John Deere 6R 230 | Difference |
|---|---|---|---|
| Type | Torque Converter | Continuously-variable transmission | — |
Dimensions & Weight
| Spec | Allis Chalmers HD21 | John Deere 6R 230 | Difference |
|---|---|---|---|
| Length | 198in | 206in | ▲ 6R 230+8 in · +4% |
| Height | 99in | 130in | ▲ 6R 230+31 in · +31% |
| Operating Weight | 45,500lb | 20,503lb | ▲ HD21+24,997 lb · +122% |
Hydraulics
| Spec | Allis Chalmers HD21 | John Deere 6R 230 | Difference |
|---|---|---|---|
| System Type | Not recorded | Closed-center PFC | — |
Power Take-off (PTO)
| Spec | Allis Chalmers HD21 | John Deere 6R 230 | Difference |
|---|---|---|---|
| Type | Not recorded | Optional Transmission or Live PTO | — |
| Speed 1 | Not recorded | 540rpm | — |
| Speed 2 | Not recorded | 1,000rpm | — |
Hitch & Towing
| Spec | Allis Chalmers HD21 | John Deere 6R 230 | Difference |
|---|---|---|---|
| Hitch Type | Not recorded | Three-Point Hitch | — |
| Hitch Category | Not recorded | III/IIIN | — |
| Hitch Position | Not recorded | Rear | — |
Electrical
| Spec | Allis Chalmers HD21 | John Deere 6R 230 | Difference |
|---|---|---|---|
| Starter Type | Electric | Electric | Same |
Capacities
| Spec | Allis Chalmers HD21 | John Deere 6R 230 | Difference |
|---|---|---|---|
| Coolant | 20gal | Not recorded | — |
Operator Station
| Spec | Allis Chalmers HD21 | John Deere 6R 230 | Difference |
|---|---|---|---|
| Type | Not recorded | Cab | — |
Category context
Both models against the field
Engine Power
median 110 hpA · 84th percentile (225 hp)B · 85th percentile (227 hp)
Engine Displacement
median 336 ciA · 96th percentile (844 ci)B · 72nd percentile (415 ci)
Cylinders
median 5.5A · 74th percentile (6)B · 74th percentile (6)
Operating Weight
median 10,914 lbA · 99th percentile (45,500 lb)B · 86th percentile (20,503 lb)
Length
median 173 inA · 77th percentile (198 in)B · 83rd percentile (206 in)
A · HD21B · 6R 230Median Agricultural Tractor