http://en.wikipedia.org/wiki/Vector_Supercars says it all far more accurately than I, so I'll let them infom you, it's worth the read.
Seen in the Sean Connery and Wesley Snipes movie "Rising Sun"
http://www.imdb.com/title/tt0107969/ , and known in the 80's as the fastest american produced car (0 - 60 in under 4 seconds if I recall correctly) they didn't sell enough to stay in production I suppose, and didn't stay in business for sure. Reading the Wikipedia article, it's a marvel they were ever heard of, wow, what a mess!
1992 Vector W8 Twin Turbo
1989 Dodge Conquest TSI
1948 Cadillac Series 62 Saoutchik Cabriolet
2008 Morgan Aeromax
2007 Dodge Demon
2007 Giugiaro
1966 AMC Marlin
1967 AMC Marlin 
1954 Kaiser Darrin
1967 Toyota 2000GT
1958 Renault R2168 Galion
1949 Delahaye D1630 Autocar
1953 Austin A35 2-door
1948 Wimille Coupe Prototype No. 2 , reminds me of http://justacarguy.blogspot.com/2008/12/emile-claveau-designer-of-innovative.html
Kaiser 1949 Vagabond
2007 Zagato Diatto Ottovu Project
1969 AMC AMX III
1956 Firebird II GM concept car, part of the Futurama touring cars display
De Tomaso 1969 Mangusta
Italia Design 1968 Bizzarini Manta
1959 Fiat 500 Bianchina 
