Анотация: Modelling and study of power and exhaust emission characteristics of a turbocharged gasoline engine with one and two turbine entrances is presented in this paper. A one-dimensional analysis using AVL ` Boost ` software was performed in the study. The model was designed considering the parameters of the engine and turbocharger, based on an Audi TT 1.8 SI gasoline engine with turbocharger with one and two turbine entrance. The study focuses on comparing engine performance with turbochargers with one and two turbine entrance in terms of torque, rotation speed and compressor efficiency at low engine speeds in the 1000-4000 min-1 range. This study shows the potential benefits of introducing a twin entry turbocharger