According to the official webpage for the IndyCar Series, IndyCars can reach speeds up to 235 mph, and the top speed in NASCAR is 212 mph. IndyCar utilizes open-wheel racers, while NASCAR vehicles are modeled after cars like the Toyota Camry and Ford Fusion.
IndyCar was once more popular than NASCAR, but NASCAR is now the most popular form of racing in America. Founded in 1948 by Bill France, Sr., the series started on humble dirt tracks, but it now races in huge stadiums across the country. The biggest race in NASCAR is the Daytona 500, which is the first race of the season and takes place in Florida.