To a lot of people a two seat diesel roadster was a bit of a crazy idea in the first place, but with fuel prices and road tax as the main determining factor (as well as company car tax) they still managed to find homes.
Now fuel is a lot cheaper, petrol CO2 emissions and economy figures are improving, and we've had 'dieselgate' is the market experiencing a major shift away from this kind of vehicle? Will diesel 'sports cars' become as undesirable as a petrol powered Peugeot 407 or VW Passat was ten years ago?