Decades ago, it was easy to tell what a sportscar was and what it wasn't. A sports car only had two seats, was commonly noisy and uncomfortable to drive, often had a poorly designed fabric roof that folded down much easier than it came back up, and was seldom as reliable, watertight, or economical to run as a more practical four-seat vehicle. If you bought one, your significant other wouldn't want to ride in it, your friends would think you nuts, and your parents would stay awake at night wondering how they had failed so badly. But all that changed with the Japanese Invasion in the 1970s, and small coupes like the Datsun 240Z and Mazda RX-7 showed the world that fun doesn't have to be foolish. The new breed was as practical and reliable as it was quick and fun to drive, and it forced the industry and enthusiasts to rethink the definition of a sports car....