Car classes like 'luxury', 'midrange' and 'economy' are very loosely defined, and deliberately so. There's no point arguing over what a luxury car is, as many groups will have different answers.

Car companies love this, after all how many times do you see something like "The best [insert feature here] in its class" in their marketing? Because there are so many different definitions of car classes, no-one can prove their statement wrong!