Technical Specifications of the David Brown 25 agricultural tractor:
David Brown 25 agricultural tractor was produced from 1953 to 1956. It is equipped with an AD4/25 engine, consisting of four cylinders, without a turbo and intercooler, with a displacement of 2523 cm³. The piston dimensions are 88.9 mm, and the piston stroke is 101.6 mm. The engine reaches a maximum power of 32 HP at 1800 RPM. The tractor has 6 forward gears and 2 reverse gears, allowing a speed range from 2.8 km/h to 25.1 km/h. The hydraulic pump has a capacity of 70 liters per minute. The rear hitch is mechanically controlled and has a maximum lifting capacity of 590 kg. The power take-off (PTO) operates at speeds of 540 and 885 RPM. David Brown 25 is equipped with a mechanically controlled braking system. The turning radius is 6.8 meters for the 2WD version. The front tires are sized 4.50-19, while the rear tires are 11.2/10-28. The total weight is 1600 kg for the 2WD version. The tractor height with cab is 137 cm, the length is 287 cm, and the width is 190 cm. The fuel tank capacity is 52 liters.
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Technical Data Sheet for David Brown 25, 30D agricultural tractors:
| Model | David Brown 25 | David Brown 30D |
| Years of production | 53-56 | 53-56 |
| Engine model / type | AD4/25 | CAD4/3 |
| Number of cylinders / turbocharging | 4 | 4 |
| Engine displacement (cm3) | 2523 | 2706 |
| Piston dimension / stroke (mm) | 88,9×101,6 | 92,1×101,6 |
| Maximum engine power (hp) / rpm | 32/1800 | 38/2000 |
| Torque (Nm) / rpm | – | – |
| Number of gears (front + rear) | 6+2 | 6+2 |
| Number of synchronized gears (front+rear) | – | – |
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| Speed-Shift | – | – |
| Type of reverse | – | – |
| Driving speed (km/h) | 2,8-25,1 | 2,8-24,9 |
| Max Driving speed (km/h) | – | – |
| Hydraulic pump capacity (L/min) | 70 | – |
| 3-Point Hitch control | mech | mech |
| 3-point hitch max load (kg) | 590 | 590 |
| PTO speed (rpm) | 540/885 | 540/885 |
| Disc brake type (dry / wet) | – | – |
| Type of control of the braking system | mech | mech |
| Turning radius 2WD (m) | 6,8 | – |
| Turning radius 4WD (m) | – | – |
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| 4,50-19 | 6,00-19 | |
| Front wheel 4WD | – | – |
| Rear wheel 2WD | 11,2/10-28 | 12,4/11-28 |
| Rear wheel 4WD | – | – |
| 2WD total weight (kg) | 1600 | 1750 |
| 4WD total weight (kg) | – | – |
| Total height with cabin (cm) | 137 | 142 |
| Total length (cm) | 287 | 296 |
| Total width (cm) | 190 | 190 |
| Fuel tank capacity (l) | 52 | 52 |
| Cabin sound level (dB) | – | – |
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