The results of the research on the development dynamics of passenger car fires as presented in this study resemble those given in articles [3] and [4]. The following conclusions can be drawn from the analysis of its results: 1. The dynamics of a car fire development mainly depends on ventilation. 2. It is difficult to start a fire in a tightly closed car. 3. The maximum temperature of a car fire in each experiment exceeded 1,000°C (by not more than several dozen °C). 4. Under the engine cover, plastic elements are damaged, while parts from an aluminium alloy partly melt. 5. After the fire damages window panes or the car is opened the temperature inside the vehicle grows very fast to more than 1000°C. This takes 2 to 5 minutes. 6. In the course of the fire, dangerous phenomena take place, posing risks for persons near the car, such as e.g. the breakup of servos. 7. A passenger car fire can last for more than an hour.