Need a car that is faster then a Pagani Zonda, Ferrari Enzo or a Mercedes McLaren SLR? Buy this Porsche 996 Turbo 9ff. Top speed? 372,2 km/h (same car that is used on Nardo for the record breaking run at the 2nd of may 2004).
For example, a Ferrari Enzo has 660 bhp, this Porsche 9ff has 744 bhp!
You can find more information here.