I have been yesterday in a Rage buggy (as a passenger) on a mud track.....That was amazing !!! never been in something that quick, crazy!! They do a version race for tarmac circuit with a different set up and that buggy can go faster than any supercars....
Have a look on
www.ragemotorsport.com
Engine :954cc 16v 150bhp or more....
^ speed manual, 375 kgs, 1 seater or two, 0 to 60 in under 3.5 seconds, top speed over 100 mph ( depending on gear ratio)
Expensive (15 995 + vat) for the basic model. Much more for the race version....but damn it is really well made!!
Few video's about it on googles and utube video's

Porsche 996 Turbo S Atlas Grey.
RS4 B7 Avant Sprint Blue. Sold.
RS4 B5 Avus Silver with MRC magic . Sold (Best car ever )
S4 B6 Avant Nogaro blue. Sold
A6 Avant Silver . 2.5 TDI .Sold