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 JCB Fastrac 3230
Image not recorded
JCBModel B
JCB Fastrac 3230
Utility
- power
- 230 hp
- displacement
- 409 ci
- Cylinders
- 6
- Forward gears
- 54
Allis ChalmersAllis Chalmers HD21
vs
JCBJCB Fastrac 3230
How they compare
Headline specs vs. the whole Agricultural
Engine Power
▲ Fastrac 3230 higher · +5 hp (+2%)HD21225 hp
Fastrac 3230230 hp
Median Agricultural Tractor110 hp
HD21 is in the 84th percentile; Fastrac 3230 is in the 85th · 1,028 models
Engine Displacement
▲ HD21 higher · +435 ci (+106%)HD21844 ci
Fastrac 3230409 ci
Median Agricultural Tractor336 ci
HD21 is in the 96th percentile; Fastrac 3230 is in the 69th · 1,083 models
Cylinders
= Effectively tiedHD216
Fastrac 32306
Median Agricultural Tractor5.5
HD21 is in the 74th percentile; Fastrac 3230 is in the 74th · 1,130 models
Forward Gears
▲ Fastrac 3230 higher · +52 (+2600%)HD212
Fastrac 323054
Median Agricultural Tractor16
HD21 is in the 1st percentile; Fastrac 3230 is in the 99th · 972 models
HD21 (A)Fastrac 3230 (B)Median Agricultural Tractor
Full comparison
Every spec, side by side
General Information
| Spec | Allis Chalmers HD21 | JCB Fastrac 3230 | Difference |
|---|---|---|---|
| Manufacturer | Allis Chalmers | JCB | — |
| Model | HD21 | Fastrac 3230 | — |
| Category | Agricultural | Utility | — |
Engine
| Spec | Allis Chalmers HD21 | JCB Fastrac 3230 | Difference |
|---|---|---|---|
| Manufacturer | Allis-Chalmers | Cummins | — |
| Model | Not recorded | QSB6.7 | — |
| Power Output | 225hp | 230hp | ▲ Fastrac 3230+5 hp · +2% |
| Rated RPM | 1,800RPM | 2,300RPM | ▲ Fastrac 3230+500 RPM · +28% |
| Cylinders | 6 | 6 | Same |
| Displacement | 844ci | 409ci | ▲ HD21+435 ci · +106% |
| Bore | 5.3in | 4.2in | ▲ HD21+1.1 in · +26% |
| Stroke | 6.5in | 4.9in | ▲ HD21+1.6 in · +33% |
Transmission
| Spec | Allis Chalmers HD21 | JCB Fastrac 3230 | Difference |
|---|---|---|---|
| Type | Torque Converter | Synchromesh | — |
Dimensions & Weight
| Spec | Allis Chalmers HD21 | JCB Fastrac 3230 | Difference |
|---|---|---|---|
| Length | 198in | 205in | ▲ Fastrac 3230+7 in · +4% |
| Width | Not recorded | 99.6in | — |
| Height | 99in | 124in | ▲ Fastrac 3230+25 in · +25% |
| Wheelbase | Not recorded | 121in | — |
| Operating Weight | 45,500lb | 17,570lb | ▲ HD21+27,930 lb · +159% |
Hydraulics
| Spec | Allis Chalmers HD21 | JCB Fastrac 3230 | Difference |
|---|---|---|---|
| Steering Type | Not recorded | Power assist | — |
Hitch & Towing
| Spec | Allis Chalmers HD21 | JCB Fastrac 3230 | Difference |
|---|---|---|---|
| Hitch Type | Not recorded | 3-point hitch | — |
| Hitch Category | Not recorded | III | — |
| Hitch Position | Not recorded | Rear | — |
Chassis & Drive
| Spec | Allis Chalmers HD21 | JCB Fastrac 3230 | Difference |
|---|---|---|---|
| Chassis Type | Not recorded | 4x4 4WD | — |
| Drive Type | Not recorded | 4WD | — |
| Steering Type | Not recorded | Power assist | — |
Electrical
| Spec | Allis Chalmers HD21 | JCB Fastrac 3230 | Difference |
|---|---|---|---|
| Starter Type | Electric | Not recorded | — |
Capacities
| Spec | Allis Chalmers HD21 | JCB Fastrac 3230 | 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 · 69th percentile (409 ci)
Cylinders
median 5.5A · 74th percentile (6)B · 74th percentile (6)
Forward Gears
median 16A · 1st percentile (2)B · 99th percentile (54)
Operating Weight
median 10,914 lbA · 99th percentile (45,500 lb)B · 77th percentile (17,570 lb)
A · HD21B · Fastrac 3230Median Agricultural Tractor