Compact sedans and compact sport utility vehicles in America have average lengths of 177.2 inches and 172.3 inches, respectively. Medium sedans and SUVs are 10 to 20 inches longer than compact automobiles, and large cars are an additional 15 to 20 inches longer.
Modern vehicles have grown in length, width, and weight in addition to length. According to Edmunds.com, compact sedans were 2 inches longer, 2 inches wider, and 374 pounds more on average in 2007 than they were in 1997. Medium and large cars followed the similar pattern.