Overview The Audi A3 and the Volkswagen Passat 2.0L FSI (BUZ engine) are two popular vehicles from the Volkswagen Group that cater to different segments, yet share several underlying technologies. Both vehicles benefit from German engineering, featuring quality materials, solid construction, and the innovative 2.0-liter FSI (Fuel Stratified Injection) engine. Despite their similarities, they serve different purposes and target different …