Funny (and sad) that when we speak of TDI's one thinks of VW's. If we lived on the other side of the pond you could look at many choices ...
http://www.dieselcar.com/
Alfa Romeo, Audi, BMW, Chrysler, Citroën ,
Daewoo, Daihatsu ,Fiat, Ford, Honda,
Hyundai, Isuzu, Jagua,r Jeep, Kia,
Land Rover, Mazda, Mercedes-Benz, MG, Rover, Mitsubishi
Nissan, Peugeot, Renault, Saab, SEAT,
Skoda, Suzuki, Tata ,Toyota, Vauxhall ,
VolksWagen, Volvo