Image not recorded
Allis ChalmersModel A
Allis Chalmers HD15
Industrial
- power
- Not recorded
- displacement
- 426 ci
- Cylinders
- 6
- Forward gears
- 6
Head to head · Industrial
Allis Chalmers HD15 vs Challenger 55
ChallengerModel B
Challenger 55
Agricultural
- power
- Not recorded
- displacement
- 442 ci
- Cylinders
- 6
- Forward gears
- 16
Allis ChalmersAllis Chalmers HD15
vs
ChallengerChallenger 55
How they compare
Headline specs vs. the whole Industrial
Engine Displacement
▲ 55 higher · +16 ci (+4%)HD15426 ci
55442 ci
Median Industrial Tractor284 ci
HD15 is in the 65th percentile; 55 is in the 66th · 53 models
Cylinders
= Effectively tiedHD156
556
Median Industrial Tractor4
HD15 is in the 88th percentile; 55 is in the 88th · 55 models
Forward Gears
▲ 55 higher · +10 (+167%)HD156
5516
Median Industrial Tractor5
HD15 is in the 65th percentile; 55 is in the 97th · 43 models
Operating Weight
▲ HD15 higher · +4,895 lb (+19%)HD1530,895 lb
5526,000 lb
Median Industrial Tractor9,127 lb
HD15 is in the 89th percentile; 55 is in the 87th · 49 models
HD15 (A)55 (B)Median Industrial Tractor
Full comparison
Every spec, side by side
General Information
| Spec | Allis Chalmers HD15 | Challenger 55 | Difference |
|---|---|---|---|
| Manufacturer | Allis Chalmers | Challenger | — |
| Model | HD15 | 55 | — |
| Category | Industrial | Agricultural | — |
Engine
| Spec | Allis Chalmers HD15 | Challenger 55 | Difference |
|---|---|---|---|
| Manufacturer | General Motors | Caterpillar | — |
| Model | Not recorded | 3126 | — |
| Rated RPM | 1,600RPM | 2,100RPM | ▲ 55+500 RPM · +31% |
| Cylinders | 6 | 6 | Same |
| Displacement | 426ci | 442ci | ▲ 55+16 ci · +4% |
| Bore | 4.3in | 4.3in | Same |
| Stroke | 5in | 5in | Same |
Transmission
| Spec | Allis Chalmers HD15 | Challenger 55 | Difference |
|---|---|---|---|
| Type | Constant Mesh | Full Power Shift | — |
Dimensions & Weight
| Spec | Allis Chalmers HD15 | Challenger 55 | Difference |
|---|---|---|---|
| Length | 181in | 211in | ▲ 55+30 in · +17% |
| Width | 96.8in | Not recorded | — |
| Height | 95in | 125in | ▲ 55+30 in · +32% |
| Operating Weight | 30,895lb | 26,000lb | ▲ HD15+4,895 lb · +19% |
Hydraulics
| Spec | Allis Chalmers HD15 | Challenger 55 | Difference |
|---|---|---|---|
| System Type | Not recorded | Variable-Displacement Load-Sensing Pressure-Compensated | — |
| Steering Type | Hydraulic | Differential Power | — |
Hitch & Towing
| Spec | Allis Chalmers HD15 | Challenger 55 | Difference |
|---|---|---|---|
| Hitch Type | Not recorded | Three-Point Hitch | — |
| Hitch Category | Not recorded | III | — |
| Hitch Position | Not recorded | Rear | — |
Chassis & Drive
| Spec | Allis Chalmers HD15 | Challenger 55 | Difference |
|---|---|---|---|
| Steering Type | Hydraulic | Differential Power | — |
Electrical
| Spec | Allis Chalmers HD15 | Challenger 55 | Difference |
|---|---|---|---|
| Starter Type | Electric Starter | Electric | — |
Capacities
| Spec | Allis Chalmers HD15 | Challenger 55 | Difference |
|---|---|---|---|
| Coolant | 11.8gal | 8.6gal | ▲ HD15+3.2 gal · +37% |
Operator Station
| Spec | Allis Chalmers HD15 | Challenger 55 | Difference |
|---|---|---|---|
| Type | Not recorded | Cab | — |
Category context
Both models against the field
Engine Displacement
median 284 ciA · 65th percentile (426 ci)B · 66th percentile (442 ci)
Cylinders
median 4A · 88th percentile (6)B · 88th percentile (6)
Forward Gears
median 5A · 65th percentile (6)B · 97th percentile (16)
Operating Weight
median 9,127 lbA · 89th percentile (30,895 lb)B · 87th percentile (26,000 lb)
Length
median 125 inA · 73rd percentile (181 in)B · 94th percentile (211 in)
A · HD15B · 55Median Industrial Tractor