One of ways of speeding up of engines is increasing of density of a fresh charge. Density of a charge can be increased by pressurization, by addition of an oxidizer in an engine power supply system - as such oxidizer N2О nitrous oxide - and by direct use of thermal energy of the fulfilled gases can serve in the engine. Three ways of speeding up of automobile engines are considered. Recommendations about use of ways of speeding up of engines are given in standard engines.