Excellent work! These are the results from the Norwegian jury (joke for Europeans only):
City 1, Göteborg, Sweden - and car A, 2008 Volvo Hot Rod Jakob - grobmotorix
City 2, Torino, Italy - and car E, 1986 Alfa Romeo Gruppo C Prototipo - Allemano
City 3, Izmit, Kocaeli, Turkey - and car K, 1993 Otosan Taunus - Allemano
City 4 - ?
City 5, Riviera Beach, Florida - and car F, 1999 Mosler TwinStar - Otto Puzzell
City 6, Hoschton, Georgia - and car G, 1997 Panoz Esperante GTR1 - Otto Puzzell
City 7, Paris, France - and car B, 1973 Citroën SM prototype - grobmotorix
City 8, Seoul, South Korea - and car C, 1999 Hyundai FGV-II - Allemano
City 9, Molsheim, France - and car D, 1952 Bugatti Type 57 'Brown' - grobmotorix
City 10, Wolfsburg, Germany - and car I, 2002 Volkswagen Tarek - grobmotorix
City 11, Sant'Agata Bolognese, Italy - and car J, 1990s Lamborghini Diablo prototype - grobmotorix
City 12, Tokyo, Japan - and car H, 1991 Nissan FLV - grobmotorix
In addition to these, car L has been correctly identified - and I leave this final point for Otto Puzzell, at Allemano's request. After he has done the last pairing, I will award the points.
And about Wikipedia: There is a Norwegian version, too, but i never trust it. The English one is used by a far greater number of people, and is thus much more likely to be correct.