The 'World Car' was in fact a heavily modified "Sonic GT", a gullwing sports coupe which was designed and built by Alois Barmettler of Nidwald, Switzerland and marketed later by Albar Cars, Germany.
For some reason, at some point after the film's U.S. home video release, the film became regarded as public domain in America. Floods of inferior-quality releases have been floating around the market, usually either sourced from the original U.S. Vidmark Entertainment VHS, or a lower quality source.