This page provides a detailed comparison of the specifications for the Allis Chalmers 190 and the John Deere 3420.
| Allis Chalmers 190 | John Deere 3420 | |
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| Engine | ||
| Engine Manufacturer | Allis Chalmers | John Deere |
| Engine Model | G2500 | - |
| Engine Cooling Type | Liquid-cooled | Liquid-cooled |
| Engine Fuel Type | Gasoline | Diesel |
| Engine Induction Type | Naturally aspirated | Naturally aspirated |
| Engine Cylinders | 6 | 6 |
| Engine Displacement Value | 265 ci (4.3 L) | 303 ci (5.0 L) |
| Engine Rated Rpm | 2200 | 2500 |
| Engine Power Output Value | - | 77 hp (57.4 kW) |
| Transmission | ||
| Transmission Type | Two-speed power shift | Syncro-Range |
| Transmission Forward Gears | 8 | 8 |
| Transmission Reverse Gears | 2 | 2 |
| Dimensions | ||
| Length Value | - | 161 |
| Operating Weight Value | 7665 lb (3477 kg) | 7668 lb (3478 kg) |
| Miscellaneous | ||
| Chassis | 4x2 2WD | 4x2 2WD |
| Drive Type | 2WD | 2WD |
| Front Tire Type | - | - |
| Rear Tire Type | - | - |
| Hitch Type | Allis Snap-Coupler, Three-Point | - |
| Hitch Category | II | II |
| Hitch Position | Rear | Rear |
| Hydraulic System Type | Open center | Closed Center |
| Operator Station Type | Open | - |
| Starter Type | Electric | Electric |
