wieso? technisch gesehen passt es doch. Das "TDI" nun eine MARKETINGbezeichnung für die Direkteinspritzer aus dem VAG Konzern ist ist doch egal

viele Namen für die gleiche Technik:

wikipedia:

CDI (Common Rail Direct Injection): Daimler, Mercedes-Benz
CDTI (Common Rail Diesel Turbo Injection): Opel
CRDi (Common Rail Direct Injection): Hyundai, Kia
dCi (Diesel Common-Rail Injection): Nissan, Renault
DDiS (Direct Diesel injection System): Suzuki (Common-Rail)
DI-D (Direct Injection Diesel): Mitsubishi (Common-Rail)
DiTD (Direct Injection Turbo Diesel): Mazda
DTI (Direct Turbo Injection): Opel
dTI (Direct Turbo Injection): Renault
D-4D (Direct Injection 4-stroke Diesel): Toyota (Common-Rail)
HDi (High Pressure Direct Injection): Citroën, Peugeot (Common-Rail)
i-CTDi (intelligent Common Rail Turbo Diesel Injection): Honda
JTD bzw. JTDM (Jet Turbo Diesel Multijet): Alfa-Romeo, Fiat, Lancia (Common-Rail)
TDCi (Turbodiesel Common Rail Injection): Ford
TDDI (Turbo Diesel Direct Injection): Ford
TDI (Turbodiesel Direct Injection): Audi, Seat, Škoda, VW
d (Diesel): BMW, Rover, Subaru