More info here: http://www.topgear.com/content/news/stories/1856/Volkswagen has revealed details of a 650bhp mid-engined Golf GTi design study.
Called the GTi W12-650 (you can see what they've done there), it uses a bi-turbo W12 engine producing 553lb ft torque through the rear wheels.
This, according to VW, means 0-62mph in just 3.7secs and a top speed of 184mph.
And more pics here: http://www.netcarshow.com/volkswagen/20 ... 0_concept/