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Allis ChalmersModel A
Allis Chalmers HD11AG
Industrial
- power
- 130 hp
- displacement
- 516 ci
- Cylinders
- 6
- Forward gears
- 6
Head to head · Industrial
Allis Chalmers HD11AG vs Allis Chalmers HD21
Allis ChalmersModel B
Allis Chalmers HD21
Agricultural
- power
- 225 hp
- displacement
- 844 ci
- Cylinders
- 6
- Forward gears
- 2
Allis ChalmersAllis Chalmers HD11AG
vs
Allis ChalmersAllis Chalmers HD21
How they compare
Headline specs vs. the whole Industrial
Engine Displacement
▲ HD21 higher · +328 ci (+64%)HD11AG516 ci
HD21844 ci
Median Industrial Tractor284 ci
HD11AG is in the 70th percentile; HD21 is in the 86th · 53 models
Cylinders
= Effectively tiedHD11AG6
HD216
Median Industrial Tractor4
HD11AG is in the 88th percentile; HD21 is in the 88th · 55 models
Forward Gears
▲ HD11AG higher · +4 (+200%)HD11AG6
HD212
Median Industrial Tractor5
HD11AG is in the 65th percentile; HD21 is in the 1st · 43 models
Operating Weight
▲ HD21 higher · +22,500 lb (+98%)HD11AG23,000 lb
HD2145,500 lb
Median Industrial Tractor9,127 lb
HD11AG is in the 81st percentile; HD21 is in the 98th · 49 models
HD11AG (A)HD21 (B)Median Industrial Tractor
Full comparison
Every spec, side by side
General Information
| Spec | Allis Chalmers HD11AG | Allis Chalmers HD21 | Difference |
|---|---|---|---|
| Manufacturer | Allis Chalmers | Allis Chalmers | Same |
| Model | HD11AG | HD21 | — |
| Category | Industrial | Agricultural | — |
Engine
| Spec | Allis Chalmers HD11AG | Allis Chalmers HD21 | Difference |
|---|---|---|---|
| Manufacturer | Allis Chalmers | Allis-Chalmers | — |
| Model | 11000 | Not recorded | — |
| Power Output | 130hp | 225hp | ▲ HD21+95 hp · +73% |
| Rated RPM | 1,800RPM | 1,800RPM | Same |
| Cylinders | 6 | 6 | Same |
| Displacement | 516ci | 844ci | ▲ HD21+328 ci · +64% |
| Bore | 4.4in | 5.3in | ▲ HD21+0.9 in · +20% |
| Stroke | 5.6in | 6.5in | ▲ HD21+0.9 in · +16% |
Transmission
| Spec | Allis Chalmers HD11AG | Allis Chalmers HD21 | Difference |
|---|---|---|---|
| Type | Gear | Torque Converter | — |
Dimensions & Weight
| Spec | Allis Chalmers HD11AG | Allis Chalmers HD21 | Difference |
|---|---|---|---|
| Length | 149in | 198in | ▲ HD21+49 in · +33% |
| Width | 95.9in | Not recorded | — |
| Height | 77.7in | 99in | ▲ HD21+21.3 in · +27% |
| Operating Weight | 23,000lb | 45,500lb | ▲ HD21+22,500 lb · +98% |
Electrical
| Spec | Allis Chalmers HD11AG | Allis Chalmers HD21 | Difference |
|---|---|---|---|
| Starter Type | Electric | Electric | Same |
Capacities
| Spec | Allis Chalmers HD11AG | Allis Chalmers HD21 | Difference |
|---|---|---|---|
| Coolant | 11gal | 20gal | ▲ HD21+9 gal · +82% |
Category context
Both models against the field
Engine Displacement
median 284 ciA · 70th percentile (516 ci)B · 86th percentile (844 ci)
Cylinders
median 4A · 88th percentile (6)B · 88th percentile (6)
Forward Gears
median 5A · 65th percentile (6)B · 1st percentile (2)
Operating Weight
median 9,127 lbA · 81st percentile (23,000 lb)B · 98th percentile (45,500 lb)
Length
median 125 inA · 60th percentile (149 in)B · 88th percentile (198 in)
A · HD11AGB · HD21Median Industrial Tractor