The Covini Six Wheeler, its designers argue, has superior steering and braking capability due to its extra set of wheels. It will be available to buyers starting in 2009.
Follow the link for more pictures and a video of the Covini driving around a racetrack.
Link
http://en.wikipedia.org/wiki/Panther_6
For the cultural minute :
http://en.wikipedia.org/wiki/Tyrrell_P34
http://www.time.com/time/specials/2007/article/0,28804,1658545_1657686_1657673,00.html