Thanks!! Glad you liked it! There are 7 cars and you unlock them by completing the tournaments. Note that after the 3 tournaments there's a "secret" race called Gymkhana Stadium that you unlock if you get the maximum points for each tournament (by placing 1st in all 3 races). Winning that race in tournament mode unlocks the 7th car. There's also a hidden 8th car that you get with a cheat, by typing "giorgiomoroder" as the name of player 2 in the options menu. If you are interested in old school indie games like this there's a somewhat similar car game by a dev called Vijuda, the game is called "Super Woden GP". Might be worth checking out. I admit I didn't play the final version yet but I played a demo once when I chatted with him for a bit (he's really cool) and the game was great.
HI! I checked the game text file and found what i believe to be is another car. it doesn't seem to have all the details but is named "Roswell 47".