These days, the definition of sports cars has taken new dimensions to include hatchbacks and sports sedans, like the BMW M3s and Mustangs, offering similar handling and performance. For old-school gearheads though, a sports car is a 2-seater built to deliver more performance and get driven enthusiastically. They don’t all have to be soft-top Miatas, but a 4-seater has crossed the sports car boundary.