This page provides a detailed comparison of the specifications for the Allis Chalmers D21 Series II and the John Deere 4520. The specifications are categorized into four main sections: Engine, Transmission, Dimensions, and Miscellaneous. By comparing these two tractors side by side, you can easily identify the similarities and differences between them and determine which one best suits your needs.
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Allis Chalmers D21 Series II
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John Deere 4520
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| Images | ||
| Engine | ||
| Engine - Manufacturer | Allis Chalmers | John Deere |
| Engine - Model | 3500 | John Deere |
| Engine - Cooling Type | Liquid-cooled | Liquid-cooled |
| Engine - Cylinder Orientation | - | - |
| Engine - Valve Configuration | - | - |
| Engine - Fuel Type | Diesel | Diesel |
| Engine - Induction Type | - | - |
| Engine - Cylinders | 6 | 4 |
| Engine - Displacement (ci) | 426 | 149 |
| Engine - Bore (in) | 4.25 | 3.386 |
| Engine - Stroke (in) | - | - |
| Engine - Rated RPM | 2200 | - |
| Engine - Power Output (hp) | 121 | 55.94 |
| Transmission | ||
| Transmission - Type | Sliding gear with dry disc clutch | Hydrostatic |
| Transmission - Forward Gears | 8 | Infinitely variable |
| Transmission - Reverse Gears | - | - |
| Transmission - Total Gears | - | - |
| Dimensions | ||
| Length (in) | 160.2 | 170.5 |
| Width (in) | 91.3 | 95.7 |
| Height (in) | 106.3 | 105.9 |
| Operating Weight (lb) | 9502 | 3,860 |
| Miscellaneous | ||
| Chassis | 4x2 2WD | - |
| Drive Type | 2WD | 4WD |
| Steering Type | Power | Power |
| Coolant Capacity (qts) | 31 | 28 |
| Front Tire Diameter (in) | - | - |
| Front Tire Width (in) | - | - |
| Rear Tire Diameter (in) | - | - |
| Rear Tire Width (in) | - | - |
| Front/Rear Rim Diameter (in) | - | - |
| Tire Type | Agricultural | - |
| Manufacture - End Year | 1969 | 1970 |
| Hitch Type | Three-Point Hitch | - |
| Hitch Category | - | - |
| Hitch Position | Rear | - |
| Hitch Capacity (lb) | - | - |
| Operator Station Type | Open | Open operator station; Cab (optional) |
| Starter Type | Electric | Electric |
| PTO Type | Independent | Independent Rear PTO |
| PTO Speed 1 (rpm) | 1000 | 540 |
| PTO Speed 2 (rpm) | - | - |
| PTO Speed 3 (rpm) | - | - |
| Brake Type | Band actuated disc | Differential hydraulic wet disc |
| Hydraulic System Type | - | Closed center |
