This page provides a detailed comparison of the specifications for the David Brown 990 Implematic and the Iseki AT50.
| David Brown 990 Implematic | Iseki AT50 | |
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| Engine | ||
| Engine Manufacturer | David Brown | Iseki |
| Engine Model | - | E4DE |
| Engine Cooling Type | Liquid-cooled | Liquid-cooled |
| Engine Fuel Type | Diesel | Diesel |
| Engine Induction Type | Natural aspiration | Naturally aspirated |
| Engine Cylinders | 4 | 4 |
| Engine Displacement Value | 186 ci (3.0 L) | 180 ci (3.0 L) |
| Engine Rated Rpm | 2200 | 2500 |
| Engine Power Output Value | 52 hp (38.8 kW) | 49 hp (36.8 kW) |
| Transmission | ||
| Transmission Type | Gear / Partially Synchronized | - |
| Transmission Forward Gears | 6 | 24 |
| Transmission Reverse Gears | 2 | 24 |
| Dimensions | ||
| Length Value | 117.7 | 138.6 |
| Width Value | 66.9 | 61.4 |
| Operating Weight Value | 4272 lb (1938 kg) | 3814 lb (1730 kg) |
| Miscellaneous | ||
| Chassis | 4x2 2WD | 4x4 MFWD 4WD |
| Drive Type | 2WD | 4WD |
| Front Tire Type | - | - |
| Rear Tire Type | - | - |
| Hitch Category | II/I | - |
| Hitch Position | Rear | - |
| Hydraulic System Type | Open Center | - |
| Operator Station Type | Open Operator Station | ROPS |
| Starter Type | Electric | Electric |
