Allis ChalmersModel A
Allis Chalmers HD11
Crawler
- power
- 110 hp
- displacement
- 516 ci
- Cylinders
- 6
- Forward gears
- 6
Head to head · Crawler
Allis Chalmers HD11 vs Caterpillar D7C
Image not recorded
CaterpillarModel B
Caterpillar D7C
Crawler
- power
- 128 hp
- displacement
- 831 ci
- Cylinders
- 4
- Forward gears
- 5
Allis ChalmersAllis Chalmers HD11
vs
CaterpillarCaterpillar D7C
How they compare
Headline specs vs. the whole Crawler
Engine Power
▲ D7C higher · +18 hp (+16%)HD11110 hp
D7C128 hp
Median Crawler Tractor200 hp
HD11 is in the 46th percentile; D7C is in the 47th · 142 models
Engine Displacement
▲ D7C higher · +315 ci (+61%)HD11516 ci
D7C831 ci
Median Crawler Tractor468 ci
HD11 is in the 58th percentile; D7C is in the 88th · 191 models
Cylinders
▲ HD11 higher · +2 (+50%)HD116
D7C4
Median Crawler Tractor6
HD11 is in the 50th percentile; D7C is in the 33rd · 192 models
Forward Gears
▲ HD11 higher · +1 (+20%)HD116
D7C5
Median Crawler Tractor10
HD11 is in the 34th percentile; D7C is in the 25th · 179 models
HD11 (A)D7C (B)Median Crawler Tractor
Full comparison
Every spec, side by side
General Information
| Spec | Allis Chalmers HD11 | Caterpillar D7C | Difference |
|---|---|---|---|
| Manufacturer | Allis Chalmers | Caterpillar | — |
| Model | HD11 | D7C | — |
| Category | Crawler, Agricultural | Crawler | — |
Engine
| Spec | Allis Chalmers HD11 | Caterpillar D7C | Difference |
|---|---|---|---|
| Manufacturer | Allis Chalmers | Caterpillar | — |
| Model | HD-516 | D339 | — |
| Power Output | 110hp | 128hp | ▲ D7C+18 hp · +16% |
| Rated RPM | 1,800RPM | 1,200RPM | ▲ HD11+600 RPM · +50% |
| Cylinders | 6 | 4 | ▲ HD11+2 · +50% |
| Displacement | 516ci | 831ci | ▲ D7C+315 ci · +61% |
| Bore | 4.5in | 5.8in | ▲ D7C+1.3 in · +29% |
| Stroke | 5.6in | 8in | ▲ D7C+2.5 in · +45% |
Transmission
| Spec | Allis Chalmers HD11 | Caterpillar D7C | Difference |
|---|---|---|---|
| Type | Sliding Gear | Gear | — |
Dimensions & Weight
| Spec | Allis Chalmers HD11 | Caterpillar D7C | Difference |
|---|---|---|---|
| Length | 154in | 168in | ▲ D7C+14 in · +9% |
| Width | 40in | 97in | ▲ D7C+57 in · +143% |
| Height | 84in | 81.3in | ▲ HD11+2.7 in · +3% |
| Operating Weight | 21,000lb | 26,930lb | ▲ D7C+5,930 lb · +28% |
Hydraulics
| Spec | Allis Chalmers HD11 | Caterpillar D7C | Difference |
|---|---|---|---|
| Steering Type | Not recorded | Manual Clutches | — |
Chassis & Drive
| Spec | Allis Chalmers HD11 | Caterpillar D7C | Difference |
|---|---|---|---|
| Chassis Type | Crawler | Not recorded | — |
| Steering Type | Not recorded | Manual Clutches | — |
| Brake Type | Contracting band | Not recorded | — |
Electrical
| Spec | Allis Chalmers HD11 | Caterpillar D7C | Difference |
|---|---|---|---|
| Starter Type | Electric | Gasoline Pony Engine | — |
Capacities
| Spec | Allis Chalmers HD11 | Caterpillar D7C | Difference |
|---|---|---|---|
| Coolant | 11gal | 17gal | ▲ D7C+6 gal · +55% |
Operator Station
| Spec | Allis Chalmers HD11 | Caterpillar D7C | Difference |
|---|---|---|---|
| Type | Open operator station | Not recorded | — |
Category context
Both models against the field
Engine Power
median 200 hpA · 46th percentile (110 hp)B · 47th percentile (128 hp)
Engine Displacement
median 468 ciA · 58th percentile (516 ci)B · 88th percentile (831 ci)
Cylinders
median 6A · 50th percentile (6)B · 33rd percentile (4)
Forward Gears
median 10A · 34th percentile (6)B · 25th percentile (5)
Operating Weight
median 23,320 lbA · 48th percentile (21,000 lb)B · 61st percentile (26,930 lb)
A · HD11B · D7CMedian Crawler Tractor