FSI Volkswagen / Audi gasoline direct injection technology, FSI may be a fuel directly into the combustion chamber, reduces the heat loss of the engine, thereby increasing the power output and reduced fuel consumption, and fuel economy for both dynamic helpful.
TFSI FSI engine is turbocharged (T), the abbreviation TFSI, Audi series models will generally so called, and the public with a series of direct-injection supercharged engine simply referred to as TSI.