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 McCormick Intl ZTX230
McCormick IntlModel B
McCormick Intl ZTX230
Agricultural
- power
- 230 hp
- displacement
- 506 ci
- Cylinders
- 6
- Forward gears
- 36
Allis ChalmersAllis Chalmers HD21
vs
McCormick IntlMcCormick Intl ZTX230
How they compare
Headline specs vs. the whole Agricultural
Engine Power
▲ ZTX230 higher · +5 hp (+2%)HD21225 hp
ZTX230230 hp
Median Agricultural Tractor110 hp
HD21 is in the 84th percentile; ZTX230 is in the 85th · 1,028 models
Engine Displacement
▲ HD21 higher · +338 ci (+67%)HD21844 ci
ZTX230506 ci
Median Agricultural Tractor336 ci
HD21 is in the 96th percentile; ZTX230 is in the 86th · 1,083 models
Cylinders
= Effectively tiedHD216
ZTX2306
Median Agricultural Tractor5.5
HD21 is in the 74th percentile; ZTX230 is in the 74th · 1,130 models
Forward Gears
▲ ZTX230 higher · +34 (+1700%)HD212
ZTX23036
Median Agricultural Tractor16
HD21 is in the 1st percentile; ZTX230 is in the 94th · 972 models
HD21 (A)ZTX230 (B)Median Agricultural Tractor
Full comparison
Every spec, side by side
General Information
| Spec | Allis Chalmers HD21 | McCormick Intl ZTX230 | Difference |
|---|---|---|---|
| Manufacturer | Allis Chalmers | McCormick Intl | — |
| Model | HD21 | ZTX230 | — |
| Category | Agricultural | Agricultural | Same |
Engine
| Spec | Allis Chalmers HD21 | McCormick Intl ZTX230 | Difference |
|---|---|---|---|
| Manufacturer | Allis-Chalmers | Cummins | — |
| Power Output | 225hp | 230hp | ▲ ZTX230+5 hp · +2% |
| Rated RPM | 1,800RPM | 2,200RPM | ▲ ZTX230+400 RPM · +22% |
| Cylinders | 6 | 6 | Same |
| Displacement | 844ci | 506ci | ▲ HD21+338 ci · +67% |
| Bore | 5.3in | 4.5in | ▲ HD21+0.8 in · +18% |
| Stroke | 6.5in | 5.3in | ▲ HD21+1.2 in · +23% |
Transmission
| Spec | Allis Chalmers HD21 | McCormick Intl ZTX230 | Difference |
|---|---|---|---|
| Type | Torque Converter | Not recorded | — |
Dimensions & Weight
| Spec | Allis Chalmers HD21 | McCormick Intl ZTX230 | Difference |
|---|---|---|---|
| Length | 198in | 210in | ▲ ZTX230+12 in · +6% |
| Height | 99in | 122in | ▲ ZTX230+23 in · +23% |
| Operating Weight | 45,500lb | 22,138lb | ▲ HD21+23,362 lb · +106% |
Hitch & Towing
| Spec | Allis Chalmers HD21 | McCormick Intl ZTX230 | Difference |
|---|---|---|---|
| Hitch Category | Not recorded | III | — |
Chassis & Drive
| Spec | Allis Chalmers HD21 | McCormick Intl ZTX230 | Difference |
|---|---|---|---|
| Chassis Type | Not recorded | 4x4 MFWD 4WD | — |
| Drive Type | Not recorded | 4WD | — |
Electrical
| Spec | Allis Chalmers HD21 | McCormick Intl ZTX230 | Difference |
|---|---|---|---|
| Starter Type | Electric | Not recorded | — |
Capacities
| Spec | Allis Chalmers HD21 | McCormick Intl ZTX230 | Difference |
|---|---|---|---|
| Coolant | 20gal | Not recorded | — |
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 · 86th percentile (506 ci)
Cylinders
median 5.5A · 74th percentile (6)B · 74th percentile (6)
Forward Gears
median 16A · 1st percentile (2)B · 94th percentile (36)
Operating Weight
median 10,914 lbA · 99th percentile (45,500 lb)B · 88th percentile (22,138 lb)
A · HD21B · ZTX230Median Agricultural Tractor