I guess supercars will have a seperate category coz too many of them are iconic. Lets just stick to non-supercars. Going by countries, gut feel tells me France wont be having too many, US maybe just manages.
Pls feel free to add.
Korea:
???
Japan:
Nissan:-
Skyline GTRs
240Z
SSS
S13
Toyota:-
Supra
Celica GT4
2000GT
Honda:-
NSX (maybe its a supercar?)
Civic TypeR and its predecessors
S2000
Integra TypeR
Mazda:-
Infini
RX7
MX5
RX8
Subaru:-
WRX/Sti
Mitsubishi:-
EVOs
GTO
Suzuki:-
GTi
SS
Ford:-
Mustang
Sierra Cosworth
XR3i
Focus RS
Capri 3000GT
Lotus Cortina
Leyland:-
Original Mini CooperS
Triumph TR5/6
LR Defender
GM / Chrysler:-
Corvette Stingray
Camero SS
Dodge Viper GTS
Alfa
Fiat
BMW
VW
Merc
Audi
Citreon:-
DS
CX
GX
Peugeot:-
206GT
Renault:-
Megane RS
R5 Gordini
Saab:-
900 turbo
Others