A turbocharged diesel engine is a type of internal combustion engine that uses a turbocharger to enhance its performance. The turbocharger compresses the incoming air, allowing more air and fuel to enter the combustion chamber. This results in increased power output and improved fuel efficiency compared to naturally aspirated diesel engines. These engines are commonly found in trucks, SUVs, and heavy machinery due to their ability to produce high torque at low RPMs. The combination of diesel fuel and turbocharging makes them suitable for demanding applications, providing both power and durability while maintaining better fuel economy.