what is tsi engine

A TSI engine is a type of petrol engine produced by Volkswagen that stands for Turbocharged Stratified Injection. TSI engines are compact, high-powered, and use less fuel. TSI technology blends the best of Volkswagens TDI diesel and FSI (fuel stratified direct injection) petrol engines to give excellent driveability and outstanding fuel economy. By adding a turbocharger and a supercharger to the fuel-injected engine, Volkswagen has developed an engine with small car fuel economy and emissions, but the power of something much bigger. The engine-driven supercharger operates at lower engine speeds with the turbocharger, powered by the exhaust gases, joining in as engine speed rises. The result is excellent driveability, no turbo lag, and outstanding performance throughout the rev range. TSI engines are found in most Volkswagen vehicles, such as the Atlas, Tiguan, and Passat, and a twin-charged performance version of the engine can be found in the Golf GTI and Jetta GLI.