Speedster with 1.6 turbo and gas? DSF engine

Hello, yesterday DSF engine looked around around 20 o’clock. Think it was a WDH. On the DSF side I learned that it was m episode 209. Subject was fuel saving concepts. Amongst them was an Opel Speedster with 1.6 Turbo engine and over 200ps. But it was not fired with normal gasoline but I think natural gas. Sound very interesting only I could not remember the special name of the model. Since I wanted to take a closer look I would have to know that of course. But he is supposed to be a single piece, but he thought it was very cool. Did he happen to see this jmd. and remember exactly what the Speedster was called and which company remodels the whole thing?http://www.dsf.de/…/dsf-motor.html Greetz