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 International Harvester TD-20 200
International HarvesterModel B
International Harvester TD-20 200
Crawler
- power
- 134 hp
- displacement
- 691 ci
- Cylinders
- 6
- Forward gears
- 6
Allis ChalmersAllis Chalmers HD21
vs
International HarvesterInternational Harvester TD-20 200
How they compare
Headline specs vs. the whole Agricultural
Engine Power
▲ HD21 higher · +91 hp (+68%)HD21225 hp
TD-20 200134 hp
Median Agricultural Tractor110 hp
HD21 is in the 84th percentile; TD-20 200 is in the 62nd · 1,028 models
Engine Displacement
▲ HD21 higher · +153 ci (+22%)HD21844 ci
TD-20 200691 ci
Median Agricultural Tractor336 ci
HD21 is in the 96th percentile; TD-20 200 is in the 95th · 1,083 models
Cylinders
= Effectively tiedHD216
TD-20 2006
Median Agricultural Tractor5.5
HD21 is in the 74th percentile; TD-20 200 is in the 74th · 1,130 models
Forward Gears
▲ TD-20 200 higher · +4 (+200%)HD212
TD-20 2006
Median Agricultural Tractor16
HD21 is in the 1st percentile; TD-20 200 is in the 11th · 972 models
HD21 (A)TD-20 200 (B)Median Agricultural Tractor
Full comparison
Every spec, side by side
General Information
| Spec | Allis Chalmers HD21 | International Harvester TD-20 200 | Difference |
|---|---|---|---|
| Manufacturer | Allis Chalmers | International Harvester | — |
| Model | HD21 | TD-20 200 | — |
| Category | Agricultural | Crawler | — |
Engine
| Spec | Allis Chalmers HD21 | International Harvester TD-20 200 | Difference |
|---|---|---|---|
| Manufacturer | Allis-Chalmers | International Harvester | — |
| Model | Not recorded | D-691 | — |
| Power Output | 225hp | 134hp | ▲ HD21+91 hp · +68% |
| Rated RPM | 1,800RPM | 1,550RPM | ▲ HD21+250 RPM · +16% |
| Cylinders | 6 | 6 | Same |
| Displacement | 844ci | 691ci | ▲ HD21+153 ci · +22% |
| Bore | 5.3in | 4.8in | ▲ HD21+0.5 in · +10% |
| Stroke | 6.5in | 6.5in | Same |
Transmission
| Spec | Allis Chalmers HD21 | International Harvester TD-20 200 | Difference |
|---|---|---|---|
| Type | Torque Converter | Gear | — |
Dimensions & Weight
| Spec | Allis Chalmers HD21 | International Harvester TD-20 200 | Difference |
|---|---|---|---|
| Length | 198in | Not recorded | — |
| Width | Not recorded | 22in | — |
| Height | 99in | Not recorded | — |
| Operating Weight | 45,500lb | 32,485lb | ▲ HD21+13,015 lb · +40% |
Electrical
| Spec | Allis Chalmers HD21 | International Harvester TD-20 200 | Difference |
|---|---|---|---|
| Starter Type | Electric | Gasoline-start | — |
Capacities
| Spec | Allis Chalmers HD21 | International Harvester TD-20 200 | Difference |
|---|---|---|---|
| Coolant | 20gal | Not recorded | — |
Category context
Both models against the field
Engine Power
median 110 hpA · 84th percentile (225 hp)B · 62nd percentile (134 hp)
Engine Displacement
median 336 ciA · 96th percentile (844 ci)B · 95th percentile (691 ci)
Cylinders
median 5.5A · 74th percentile (6)B · 74th percentile (6)
Forward Gears
median 16A · 1st percentile (2)B · 11th percentile (6)
Operating Weight
median 10,914 lbA · 99th percentile (45,500 lb)B · 96th percentile (32,485 lb)
A · HD21B · TD-20 200Median Agricultural Tractor