Free car games can be legally downloaded at Download.com. As of 2015, the 'Driving Games' category of the 'Games' section has nearly 500 free-to-download car games. Every game on the site is rated by users.
'Superstar Racing' is a popular free-to-play multiplayer car game. The racing game, which is developed by Chat Republic Games, can be downloaded at SuperstarRacing.net.
WildTangent.com also has a collection of free downloadable car games. As of 2015, there are 31 free racing games on the site. The top rated game is 'Crazy Chicken Kart 2'. 'Fireburst' and 'Final Drive Fury' are other popular free car games at WildTangent.com.