The model of a car is its design, in the context of the manufacturer's range or series of cars. Different models, variants are distinguishable by technology, components, underpinnings, and/or style and appearance.
The methods used to categorise cars into models differ significantly between manufacturers. Frequently, several different body variants are offered, depending on market demand; and when completing their 'production lifespan', sufficiently successful models are usually followed by a new 'generation' of that model.
The name of a model (range or series) is almost always trademarked, so that competing manufacturers cannot also use it (unless the owner permits it, for an agreed licence fee).
A popular model can have a significantly valuable brand name, and manufacturers often take great care in fostering and maintaining the brand image of the models bearing the name, both in terms of key model characteristics, as well as the targeted market, and the expected or desired buyer's demographic.