The paper deals with performance measurement of combustion engines. Currently, in combustion engines is not used only fuel from fossil fuel (diesel, gasoline), but also the fuel of biological origin. Due to most engines are designed for fossil fuels, it is possible to expect a reduction of power parameters (lower calorific value of fuel) of biofuels. Whether the vehicle (tractor) fulfill the operational requirements of the user in that conditions, it is often necessary to control by measurement. The measurement can performed by using static (dynamometer) or dynamic methods. It is usually necessary to expect, that performance parameters of the engine with a turbocharger can be distorted by using dynamic methods. In the article is stated a comparison both of methods on road vehicle Skoda Octavia 1.8 turbo and tractor ZetorForterra 8641.