The first tractors were driven by steam engines (Lokomobile). Later in Europe the diesel engine as a power source, while in America for some time and petrol engines were used. Until the 1970s tractors had rather modest engine performance, but for high torque and high-defined gearbox. Modern tractors are often over 100 kW power and can sometimes up to 80 km / h speed. Especially high performance sports show on tractors, for the Tractor Pulling used a motor sport which in the 20th Century in the United States and came in the early 80s also spread over Europe. When Tractor Pulling involves a brake, his Zugwiderstand streckenabhängig increased to a 100 m track as far as possible thereafter. In the outdoor category, the services of tractors sometimes up to 10,000 hp. A very well-known design, the Lanz Bulldog of 1921, which even after the Second World War as a model for many buildings worldwide served today and lovers prices. He belongs in every meeting of historic tractors simply in different areas of Germany developed the name Bulldog colloquially even become synonymous with the term tractor. The Lanz plant in Mannheim was established in 1956 by John Deere and is now the largest tractor factory in Europe. The way in the Treckerentwicklung were the inventions of the three-point rear suspension with hydraulic (hydraulic three-point) by Harry Ferguson and the PTO, from around 1960 and general-out of agricultural tractor from a very versatile devices used tractors made. Outside of agriculture tractors are also known as the circus tractors and road construction. Also in the local Green Care and street cleaning, the use of special mostly smaller tractors increased more and more.
In order for the cross-field work necessary to achieve often have four-wheel drive tractors and at least two, often also four very large wheels with grobstolligen profile. The vehicle's steering is done with (electro) hydraulic support. Today's tractors are available for multiple uses in all its forms, as very small, especially in the mountains in the forestry or Serviced Alpine Pasture can be used for very small or large wine for farming in lowland areas. For optimal speed for the work to achieve, modern tractors often on a vielstufiges Last gearbox or a CVT. As additional equipment commonly used in tractors is a front loader, sometimes a rear loader appropriate. Larger tractors now mostly on a cabin with air conditioning and other vehicles to have technical features such as Einzelradbremse and differential locks. Special provide the Unimog, the device makers and the so-called Muli, which usually with a slightly longer wheelbase than other tractors are constructed. The device
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