Just to squelch any rumors, the Bluesport roadster TDI has not been confirmed. It was given a development codename but this platform also carries the next Porsche sub-Boxster level roadster as mentioned below. It could also end up as an Audi-only model due to cost. Or a gasoline model comes to the US but not the TDI version. You can read more here:
....Right now, there is only one Volkswagen BlueSport in existence, and apart from its unveiling at the Detroit auto show in January, this is the only time it has been allowed in public.
Originally conceived as a one-off concept car, the compact mid-engine roadster has an internal development code name, raising hopes that it will go into production as a spiritual successor to the 914, the mid-engine roadster that VW developed and Porsche sold....
Other engines are under consideration for production, says Mario Fabiano, the car's project leader. They include the 265-hp, 2.0-liter, turbocharged, gasoline direct-injection four recently confirmed for the Scirocco R. Can you say junior Boxster?