Production or concept? If it's a production car I can't see how they'll keep it anywhere near 750 kilos, that's less than a Lotus Elise. To get it under 800 kilos they'll need to extensively use carbon fibre or similar lightweight materials, driving the price up. 260-270bhp in a lightweight Audi (with RWD, please) could make for a lot of fun, but I can't find any other info on this, so I'm assuming it's a concept.