The world's fastest roadster is a Bugatti... Apr 17, 2013 6:40:20 GMT -8 Quote Select PostDeselect PostLink to PostMemberGive GiftBack to Top Post by gwadagone on Apr 17, 2013 6:40:20 GMT -8 The world's fastest roadster is a Bugatti Veyron 16.4 Grand Sport vitess:--254.04 mph--Please see this article here:www.ultimatecarpage.com/car/5534/Bugatti-Veyron-16.4-Grand-Sport-Vitesse-WRC.htmlGreetings.