Bugatti Galibier -- a race car! Engine is a front-mounted, twin-turbocharged engine that delivers power via permanent four wheel drive -- Comparable to the quad-turbocharged unit used in the Bugatti Veyron. Downside: Still only a concept car.
Bugatti Veyron Super Sports was known for being most expensive car on the market until the Lamborghini Veneno has been unveiled at Geneva Motor show. Bugatti Veyron Super Sports can reach a top speed of 267 mph km/h).