This page provides a detailed comparison of the specifications for the Zetor 3321 and the Zetor Proxima 6421.
| Zetor 3321 | Zetor Proxima 6421 | |
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| Engine | ||
| Engine Manufacturer | Zetor | Zetor |
| Engine Cooling Type | Liquid-cooled | Liquid-cooled |
| Engine Fuel Type | Diesel | Diesel |
| Engine Induction Type | Naturally aspirated | Turbocharged |
| Engine Cylinders | 3 | 4 |
| Engine Displacement Value | 164 ci (2.7 L) | 254 ci (4.2 L) |
| Engine Rated Rpm | 2200 | 2200 |
| Engine Power Output Value | 46 hp (34.3 kW) | 64 hp (47.7 kW) |
| Transmission | ||
| Transmission Type | Collar Shift, Mech Shuttle | Syncromesh with mechanical shuttle |
| Transmission Forward Gears | 10 | 12 |
| Transmission Reverse Gears | 2 | 12 |
| Dimensions | ||
| Length Value | 133 | 152 |
| Width Value | 73 | 73 |
| Operating Weight Value | 6220 lb (2821 kg) | 7240 lb (3284 kg) |
| Miscellaneous | ||
| Chassis | 4x2 2WD | 4x2 2WD |
| Drive Type | 2WD | 2WD |
| Front Tire Type | - | - |
| Rear Tire Type | - | - |
| Hitch Type | Three-Point Hitch | Three-Point Hitch |
| Hitch Category | II/I | Category 2/1 |
| Hitch Position | Rear | Rear |
| Hydraulic System Type | Open Center | Open Center |
| Operator Station Type | - | Both Open (ROPS) and Cab Configuration Available |
| Starter Type | Electric | 12 volt electric |
