Designing the TT and TTS concept has been quite a world tour. In the first half of 1994, they started sketching and making 1-in-4 scale models in a village near Ingolstadt. Bauhaus was the design starting point, function determined form to minimise the design.

Once the approval on the exterior was there, the design team travelled to the Audi Design Center in Simi Valley California in the 2nd half of 1994 for the interior design. Here, the rings and round shapes and the use of matt aluminium were converted into the typical interior design along with basesball gauntlet inspiration for the TTS Roadster.  Just before Christmas 1994, the initial idea had been developed into 1-to-1 drawings.

By early 1995, the design team was back in Ingolstadt. To work out the design interior there in clay models and see if it still made the impact at full size as expected from the drawing.

Around summer 1995 they moved again and this time Freeman Thomas and Romulus Rost went to Italdesign's studio in Turin to build the famous TT Coupé and TTS Roadster concept