The 1.9 TDI is Volkswagen Group's long-running 1.9 litre turbocharged diesel engine, fitted to countless VW, Audi, Seat and Skoda models from the 1990s onward. It earned a cult following for durability, torque and huge mileage potential, becoming a staple of European car culture. Online, its distinctive idle and rev have turned into shorthand for tough, smoky, no-nonsense diesels, shared in start-up clips, memes and edits celebrating cars that refuse to die despite age, rust and neglect.