What is Turbocharged Direct Injection (TDI)?
Turbocharged Direct Injection (TDI) is a brand name used by the VW Group for its diesel engines – that's Volkswagen, Audi, SEAT and Skoda. The 'D' doesn't stand for diesel as you might expect it to. Kia, for example, uses a variation – T-GDi – on its turbocharged petrol engines, where the 'G' stands for gasoline. Turbocharged direct injection just tells you that the car has a turbocharger and that the fuel is more precisely controlled than a car with multi-port indirect fuel injection.
Related glossary terms
TFSI - turbocharged fuel stratified injectionTurbocharged Fuel Stratified Injection (TFSI) is predominantly used by Audi to designate its turbo-petrol cars.TurbochargerA turbocharger is a snail-shaped device that captures energy from spent exhaust gases and uses it to force more fresh air into an engine.GDI - gasoline direct injectionGDI (gasoline direct injection) is a method of fuel injection used by some modern petrol engines.