In free roaming mode, choose Viktor as your player. You will start in a purple Brabus outside the Skobel building in the city. Exit the Skobel building, turn down the side street directly opposite and drive to the end where you will have to take a right turn. Just ahead you will find the Peugeot 406 from the film "Taxi". It has one of the fastest top speeds of any car in the game and handles brilliantly.