Technical specification of agricultural tractor Steyr 548/658/768 :
| Model | Steyr 548 | Steyr 658 | Steyr 768 |
| Years of production | 1977-80 | 1977-79 | 1977-79 |
| Engine model / type | WD 308.45 | WD 408.42 | WD 408.43 |
| Number of cylinders / turbocharging | 3 | 4 | 4 |
| Engine displacement (cm3) | 2355 | 3140 | 3140 |
| Piston dimension / stroke (mm) | 100×100 | 100×100 | 100×100 |
| Maximum engine power (hp) / rpm | 47/2400 | 55/2200 | 64/2200 |
| Torque (Nm) / rpm | 157/1500 | 192/1500 | 216/1600 |
| Number of gears (front + rear) | 16+8 | 16+8 | 16+8 |
| Number of synchronized gears (front+rear) | 16+8 | 16+8 | 16+8 |
| Speed-Shift | – | – | – |
| Type of reverse | – | – | – |
| Driving speed (km/h) | 1,5-29,8 | 1,5-24,8 | 1,7-27,8 |
| Max Driving speed (km/h) | – | – | – |
| Hydraulic pump capacity (L/min) | 23 | 34 | 34 |
| 3-Point Hitch control | mech | mech | mech |
| 3-point hitch max load (kg) | 1850 | 2400 | 2400 |
| PTO speed (rpm) | 540/1000 | 540/1000 | 540/1000 |
| Disc brake type (dry / wet) | – | – | – |
| Type of control of the braking system | – | – | – |
| Turning radius 2WD (m) | 6,9 | 7,6 | 7,6 |
| Turning radius 4WD (m) | 9 | 10 | 9,6 |
| Front wheel 2WD | – | – | – |
| Front wheel 4WD | – | – | – |
| Rear wheel 2WD | – | – | – |
| Rear wheel 4WD | – | – | – |
| 2WD total weight (kg) | 1960 | 2465 | 2560 |
| 4WD total weight (kg) | 2230 | 2655 | 2757 |
| Total height with cabin (cm) | 203 | 215 | 222 |
| Total length (cm) | 330/333 | 355 | 354 |
| Total width (cm) | 195 | 213 | 213 |
| Fuel tank capacity (l) | 62 | 83 | 83 |
| Cabin sound level (dB) | – | – | – |
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The history of the Czech brand Zetor began immediately after the Second World War, in 1946. That year the Brno-based company was established, and at the same time the first Zetor model, model number 25, was manufactured. In less than a year, Zetor manufactured around 3400 Zetor 25 models. Farmers value Zetor tractors for their quality/price ratio.
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