With continuous changes happening in a city’s infrastructure like construction of new roads, flyovers, metro rails, hundreds of new vehicles being bought everyday, etc., the traffic in a city is also rapidly increasing. This has forced the motor car drivers to change their driving behaviour. Different motorist driving in different patterns affects engine components to a different extent, so a study to understand the driving behaviour should be carried out at intervals of 4–5 years to establish critical design parameters for different components of the engine. This project has been undertaken to study the dispersion in various parameters affecting driving behaviour of different drivers. A study with 24 motorists of different age groups and professions has been conducted. Each motor driver had to drive the same passenger vehicle in predefined condition with parameters that critically affect engine components. The data was recorded from ECU through OBD port and a set of hardware and studied statistically.