Todays Nascar cars run on less gas and have more horse power. The reason they run on less gas because of the environment. The cars are now more powerful then ever. They able to go over 200 miles per hour a now.
Todays cars now have more safety features. They now have air bags on all the sides. They also have 2 set seat belt. Nascars are considered to be the safest cars to get in a crash with/