I found a company in the USA that makes one of the most insane road driving devices of all time.
It is called the Brimstone, and the best way to describe it is a hotrod quad... of death.
Some quick specs
0-60mph in 2.8s
0-120mph in 6s
15-30mpg
300-750hp
Optional Carbon Fiber front/rear spoilers
Construction of many components in carbon fiber, kevlar, aluminum, magnesium, titanium, stainless steel with plenty of build customization options.
http://www.brimstonecycles.com/