What does the 't' in cars mean?

[LePenelope]

The 't' in cars stands for turbocharging, where 't' is the abbreviation for 'turbo'. When you see 'turbo' or 't' on the rear of a car, it indicates that the vehicle is equipped with a turbocharged engine. Turbocharging refers to a process where the exhaust gases from the car are not directly released into the atmosphere but instead are used to drive a turbocharger, which pressurizes the intake air to improve its efficiency. A turbocharger is a type of air compressor driven by the exhaust gases from an internal combustion engine, utilizing a structure composed of two coaxial impellers. It increases the airflow into the internal combustion engine or boiler, thereby enhancing the engine's output power. Turbochargers are categorized into constant-pressure turbocharging and pulse turbocharging.