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Allis ChalmersModel A
Allis Chalmers D12
Row Crop
- power
- 31 hp
- displacement
- 149 ci
- Cylinders
- 4
- Forward gears
- 4
Head to head · Row Crop
Allis Chalmers D12 vs Oliver OC-4
OliverModel B
Oliver OC-4
Utility
- power
- 30.5 hp
- displacement
- 130 ci
- Cylinders
- 3
- Forward gears
- 4
Allis ChalmersAllis Chalmers D12
vs
OliverOliver OC-4
How they compare
Headline specs vs. the whole Row Crop
Engine Power
▲ D12 higher · +0.6 hp (+2%)D1231 hp
OC-430.4 hp
Median Row Crop Tractor138 hp
D12 is in the 3rd percentile; OC-4 is in the 3rd · 1,206 models
Engine Displacement
▲ D12 higher · +19 ci (+15%)D12149 ci
OC-4130 ci
Median Row Crop Tractor391 ci
D12 is in the 4th percentile; OC-4 is in the 3rd · 1,409 models
Cylinders
▲ D12 higher · +1 (+33%)D124
OC-43
Median Row Crop Tractor6
D12 is in the 17th percentile; OC-4 is in the 2nd · 1,417 models
Forward Gears
= Effectively tiedD124
OC-44
Median Row Crop Tractor16
D12 is in the 4th percentile; OC-4 is in the 4th · 1,200 models
D12 (A)OC-4 (B)Median Row Crop Tractor
Full comparison
Every spec, side by side
General Information
| Spec | Allis Chalmers D12 | Oliver OC-4 | Difference |
|---|---|---|---|
| Manufacturer | Allis Chalmers | Oliver | — |
| Model | D12 | OC-4 | — |
| Category | Row Crop | Utility | — |
Engine
| Spec | Allis Chalmers D12 | Oliver OC-4 | Difference |
|---|---|---|---|
| Manufacturer | Allis-Chalmers | Hercules | — |
| Model | Power-Crater | Not recorded | — |
| Power Output | 31hp | 30.5hp | ▲ D12+0.6 hp · +2% |
| Rated RPM | 1,650RPM | 1,700RPM | ▲ OC-4+50 RPM · +3% |
| Cylinders | 4 | 3 | ▲ D12+1 · +33% |
| Displacement | 149ci | 130ci | ▲ D12+19 ci · +15% |
| Bore | 3.5in | 3.5in | Same |
| Stroke | 3.9in | 4.5in | ▲ OC-4+0.6 in · +15% |
Transmission
| Spec | Allis Chalmers D12 | Oliver OC-4 | Difference |
|---|---|---|---|
| Type | Sliding Gear | Gear | — |
Dimensions & Weight
| Spec | Allis Chalmers D12 | Oliver OC-4 | Difference |
|---|---|---|---|
| Length | 121in | 111in | ▲ D12+10 in · +9% |
| Width | Not recorded | 60in | — |
| Height | 76.5in | Not recorded | — |
| Operating Weight | 2,800lb | 4,720lb | ▲ OC-4+1,920 lb · +69% |
Hydraulics
| Spec | Allis Chalmers D12 | Oliver OC-4 | Difference |
|---|---|---|---|
| System Type | Live | Not recorded | — |
| Steering Type | Manual | Not recorded | — |
Power Take-off (PTO)
| Spec | Allis Chalmers D12 | Oliver OC-4 | Difference |
|---|---|---|---|
| Type | Rear | Not recorded | — |
| Speed 1 | 540rpm | Not recorded | — |
Hitch & Towing
| Spec | Allis Chalmers D12 | Oliver OC-4 | Difference |
|---|---|---|---|
| Hitch Type | Snap-Coupler | Not recorded | — |
| Hitch Category | I | Category 3 | — |
| Hitch Position | Rear | Not recorded | — |
Chassis & Drive
| Spec | Allis Chalmers D12 | Oliver OC-4 | Difference |
|---|---|---|---|
| Chassis Type | 4x2 2WD | Not recorded | — |
| Drive Type | 2WD | Not recorded | — |
| Steering Type | Manual | Not recorded | — |
Electrical
| Spec | Allis Chalmers D12 | Oliver OC-4 | Difference |
|---|---|---|---|
| Starter Type | Electric | Electric Starter | — |
Capacities
| Spec | Allis Chalmers D12 | Oliver OC-4 | Difference |
|---|---|---|---|
| Coolant | 2gal | 3gal | ▲ OC-4+1 gal · +50% |
Operator Station
| Spec | Allis Chalmers D12 | Oliver OC-4 | Difference |
|---|---|---|---|
| Type | Open | Not recorded | — |
Category context
Both models against the field
Engine Power
median 138 hpA · 3rd percentile (31 hp)B · 3rd percentile (30.5 hp)
Engine Displacement
median 391 ciA · 4th percentile (149 ci)B · 3rd percentile (130 ci)
Cylinders
median 6A · 17th percentile (4)B · 2nd percentile (3)
Forward Gears
median 16A · 4th percentile (4)B · 4th percentile (4)
Operating Weight
median 12,307 lbA · 2nd percentile (2,800 lb)B · 7th percentile (4,720 lb)
A · D12B · OC-4Median Row Crop Tractor