[Shinigami]

The popular definition on the net shows that "kit car" is an automobile available in kit form. You buy the pieces and build it yourself. By that definition, the Ariel Atom is not a kit car.

If kit car overcame other definitions, then one could call a very large number of vehicles kit cars. e.g. most parts in a Volvo come from Ford parts bins. How much in a Vanquish is really "Aston Martin", coz there too, you'll find Volvo side mirrors and doors from Mazda.

The concept of using parts from across ranges of vehicles is not a new concept, and just because the Zonda has a V12 from MB would not make it a kit car based on the first analogy. In fact, a very large portion of the "Zonda" is built uniquely at their own factory (parts machined from solid aluminium, nevermind the unique CF body).

Very few cars these days have truly unique parts. Those that do such as the new Mazda MX5 (some 90% of all parts are unique) still come with a Ford EcoTech engine. So it's a kit car all of a sudden?

Someone seems to be generalizing the term "kit car" a bit too much.