The secure travel and the safety of passengers are the utmost priority for transportation authorities all over the world. The fire safety in railway rolling stocks has gained significant importance in recent years. The study of fire dynamics including the fire growth and spreading, allows the development of fire protection techniques and passenger evacuation scenarios. Understanding fire development in train carriages is limited as few experimental investigations have been conducted on full-scale fire dynamic measurements of entire passenger coaches. This paper represents a comprehensive account of the computational fluid dynamics model used for the simulation of the fire dynamics in full scale rolling stock vehicle. Full-scale heat release rate (HRR) measurements were carried out for the entire vehicle as well as temperature distribution for various fire compartment scenarios. The model was tested and the simulation results were verified against those presented in experimental research developments in the literature.