Why is the Audi A7 known as a "four-door coupe"?

I've been looking at the Audi A7 and one of its common descriptors is "four-door coupe." Why is this term used for this particular car? What makes it different from a traditional sedan?

The term "four-door coupe" is generally used to describe a car that has the look and feel of a coupe, but with four doors for practicality. This is achieved through a sloping roofline and sleek design elements, such as frameless doors and a low, aerodynamic profile. In the case of the Audi A7, it still has the sporty and stylish look of a coupe, but with the added convenience of four doors.

The "four-door coupe" trend started with the Mercedes-Benz CLS in 2004, which had a similar design to the Audi A7. Since then, other luxury car brands have followed suit, including Audi with the A7. It's a way to offer a more unique and upscale option for those who want the practicality of a four-door car, but the style and performance of a coupe.

The term "four-door coupe" is also used to differentiate these types of cars from traditional sedans. Unlike a sedan, which has a more upright roofline and traditional trunk, the Audi A7 has a more swooping roofline and a hatchback style trunk. This allows for more cargo space and a more streamlined look. So it's not just about the design, but also the practicality it offers.