Today TDI is just a moniker. A name for VW's range of diesel engines. The complete term is TDI CR. CR stands for Common Rail. I wonder how many times i've said this on TFI. By classic definition TDI - Turbocharged Direct Injection. Even the Multijet is TDI by this definition - It is Turbocharged with Direct Injection. All modern diesels are Direct Injection today Indirect Injection diesels are a thing of history now. Please read up before posting. Gurjinder.