I'm really confused about something regarding cars. A lot of sports cars that I am familiar with are regarded as "Grand Tourers". Some of them made sense, like the Mercedes AMG CLK and Nissan Skyline GT-R, which are both high performance touring versions of their respective cars. However, I've also seen the Toyota Supra, Mitsubishi 3000GT and Porsche 911 referred to as Grand Tourers. I thought they were just sports cars, particularly the iconic 911. Meanwhile, Lamborghinis, the Acura NSX and Corvette are just sports cars, not GTs. Roadsters are a lot easier to distinguish, being smaller convertibles, but many refer to them as sport cars too. I digress. So, what makes something a GT, or what makes it a pure sports car?