clipped from: www.concept-cars.org   
Germany: Brabus CLS Rocket
brabus police
Germany: Porsche 911 Carrera
police porsche
Austria: Porsche 911
austria police
Italy: Lamborghini Gallardo
Italy: Smart
smart police car
USA: Dodge Magnum
USA: Dodge Viper
USA: Corvette C6
corvette police car
USA: Ford Mustang
mustang police car
USA: Hummer H2
hummer police car
UK: Lamborghini Gallardo
UK: Lotus Exige
lotus exige concept car
Australia: Holden VE Commodore
Australia: Alfa Romeo GT
Japan: Nissan Skyline GT-R

China: Hummer (It just HAD to be a replica)

Holland: Spyker C8 Spyder
Canada: Jaguar S Type
Bulgaria: Porsche 911
South Africa: Lamborghini Gallardo