Audi 35TFSI is a turbocharged stratified fuel injection engine. Audi A6L35TSI means that the power generated per liter of displacement is 35kW. TFSI is an FSI turbocharged (T) engine, referred to as TFSI for short. Generally, Audi series models will be called this. Audi is a car manufacturer from Germany. Audi owns many cars and SUVs.