
Allis ChalmersModel A
Allis Chalmers 7040
Row Crop
- power
- 151 hp
- displacement
- 426 ci
- Cylinders
- 6
- Forward gears
- 20
Head to head · Row Crop

Row Crop
Utility
How they compare
7040 is in the 58th percentile; 6S.155 is in the 59th · 1,206 models
7040 is in the 72nd percentile; 6S.155 is in the 31st · 1,409 models
7040 is in the 50th percentile; 6S.155 is in the 17th · 1,417 models
7040 is in the 70th percentile; 6S.155 is in the 81st · 1,200 models
Full comparison
| Spec | Allis Chalmers 7040 | Massey Ferguson 6S.155 | Difference |
|---|---|---|---|
| Manufacturer | Allis Chalmers | Massey Ferguson | — |
| Model | 7040 | 6S.155 | — |
| Category | Row Crop | Utility | — |
| Spec | Allis Chalmers 7040 | Massey Ferguson 6S.155 | Difference |
|---|---|---|---|
| Manufacturer | Allis Chalmers | AGCO Power | — |
| Model | 3500 Mark II | 49LFNT-D5 | — |
| Power Output | 151hp | 153hp | ▲ 6S.155+2 hp · +1% |
| Rated RPM | 2,300RPM | 1,950RPM | ▲ 7040+350 RPM · +18% |
| Cylinders | 6 | 4 | ▲ 7040+2 · +50% |
| Displacement | 426ci | 300ci | ▲ 7040+126 ci · +42% |
| Bore | 4.3in | 4.3in | Same |
| Stroke | 5in | 5.3in | ▲ 6S.155+0.3 in · +6% |
| Spec | Allis Chalmers 7040 | Massey Ferguson 6S.155 | Difference |
|---|---|---|---|
| Type | Partial Power Shift | Power Shift and Continuously Variable Transmission (CVT) | — |
| Spec | Allis Chalmers 7040 | Massey Ferguson 6S.155 | Difference |
|---|---|---|---|
| Length | 174in | 186in | ▲ 6S.155+12 in · +7% |
| Width | 95.5in | Not recorded | — |
| Height | 116in | 119in | ▲ 6S.155+3 in · +3% |
| Operating Weight | 11,700lb | 13,889lb | ▲ 6S.155+2,189 lb · +19% |
| Spec | Allis Chalmers 7040 | Massey Ferguson 6S.155 | Difference |
|---|---|---|---|
| System Type | Closed Center | Open Center | — |
| Steering Type | Hydrostatic Power | Not recorded | — |
| Spec | Allis Chalmers 7040 | Massey Ferguson 6S.155 | Difference |
|---|---|---|---|
| Type | Independent | Not recorded | — |
| Speed 1 | 540rpm | Not recorded | — |
| Spec | Allis Chalmers 7040 | Massey Ferguson 6S.155 | Difference |
|---|---|---|---|
| Front Tire Size | 11.00-16 | Not recorded | — |
| Rear Tire Size | 18.4-38 | Not recorded | — |
| Spec | Allis Chalmers 7040 | Massey Ferguson 6S.155 | Difference |
|---|---|---|---|
| Hitch Type | Three-Point Hitch | Three-Point Hitch | Same |
| Hitch Category | III/II | Category 3 | — |
| Hitch Position | Rear | Rear | Same |
| Spec | Allis Chalmers 7040 | Massey Ferguson 6S.155 | Difference |
|---|---|---|---|
| Chassis Type | 4x2 2WD | Not recorded | — |
| Drive Type | 2WD | Not recorded | — |
| Steering Type | Hydrostatic Power | Not recorded | — |
| Brake Type | Differential Hydraulic Wet Discs | Not recorded | — |
| Spec | Allis Chalmers 7040 | Massey Ferguson 6S.155 | Difference |
|---|---|---|---|
| Starter Type | Electric | Electric | Same |
| Spec | Allis Chalmers 7040 | Massey Ferguson 6S.155 | Difference |
|---|---|---|---|
| Standard | Not recorded | Stage V | — |
| Spec | Allis Chalmers 7040 | Massey Ferguson 6S.155 | Difference |
|---|---|---|---|
| Coolant | 7.8gal | Not recorded | — |
| Spec | Allis Chalmers 7040 | Massey Ferguson 6S.155 | Difference |
|---|---|---|---|
| Type | Acousta-Cab | Cab | — |
Category context