| This list is intended as a reference for people who are confused by the name changes car models sometimes undergo when exported. This is usually due to the tastes of the market in question -- Americans want cars that sound cool and dynamic, or at best some meaningless letters and numbers (Altima and Maxima, for example, sounding like "ultimate" and "maximum", or Lexus LS430), not girls' names or strange words (such as Gloria, Silvia, Cima) or the like. As a result, nobody knows quite what's what anymore.
If you know of any that aren't listed here, feel free to /msg me with additions/corrections.
JAPAN NORTH AMERICA
Honda Inspire -> Acura TL
Honda Integra -> Acura RSX (Latest generation Integra.)
Honda Lagreat -> Honda Odyssey
Honda Legend -> Acura RL (Later generations.)
Honda Saber -> Acura TL
Mazda Autozam Revue -> Mazda 121
Mazda Eunos 100 -> Mazda Protegé
Mazda Eunos 800 -> Mazda Millennia
Mazda Eunos Presso -> Mazda MX-3, Mazda MX-3 Precidia
Mazda Eunos Roadster -> Mazda MX-5 Miata
Mazda Familia -> Mazda 323
Mazda Infini FD -> Mazda RX-7 (1991-1999)
Mazda Savanna FC -> Mazda RX-7 (1986-1990)
Mitsubishi GTO -> Mitsubishi 3000GT
Mitsubishi Lancer Cedia -> Mitsubishi Lancer
Nissan 180SX -> Nissan 240SX (Fastback.)
Nissan Bluebird -> Datsun 510, Nissan Stanza, Nissan Altima
Nissan Cedric -> Datsun 240C, 260C, 280C, Nissan 300C
Nissan Cima -> Infiniti M45
Nissan Fairlady 2000 -> Datsun 2000
Nissan Fairlady Z -> Datsun 240Z, 260Z, 280Z, 280ZX, Nissan 300ZX, 350Z
Nissan Prairie -> Nissan Stanza Wagon
Nissan Primera -> Infiniti G20
Nissan Silvia -> Nissan 240SX (Coupe.)
Nissan Skyline V35 -> Infiniti G35
Nissan Sunny -> Nissan Sentra
Toyota Altezza -> Lexus IS Series
Toyota Aristo -> Lexus GS Series
Toyota Celsior -> Lexus LS Series
Toyota Corolla Levin -> Toyota Corolla
Toyota Cynos -> Toyota Paseo
Toyota Soarer -> Lexus SC Series
Toyota Sprinter Trueno -> Toyota Corolla
Toyota Windom -> Lexus ES Series
JAPAN EUROPE
Mazda Eunos 500 -> Mazda Xedos 6
Nissan March -> Nissan Micra
Nissan Sunny -> Nissan Almera
GERMANY BRITAIN
Opel Speedster -> Vauxhall VX220
Opel Astra -> Vauxhall Cavalier
GERMANY AUSTRALIA
Opel Astra -> Holden Astra (Thanks Kawika.)
Opel Commodore -> Holden Commodore
GERMANY NORTH AMERICA
Volkswagen Golf -> Volkswagen Rabbit
Volkswagen Passat -> Volkswagen Dasher, Volkswagen Quantum
AUSTRALIA NORTH AMERICA
Mazda Eunos 30X -> Mazda MX-3
EUROPE NORTH AMERICA
Lancia Montecarlo -> Lancia Beta Scorpion
NORTH AMERICA EUROPE
Mercury Cougar -> Ford Cougar
Nissan NX -> Nissan NX100
The title is the absolute best I can do. Deal with it. | 
