"Audi's first logo, introduced in 1909, was a forerunner version consisting of an oval outline with a handwritten inscription in diagonal lines. The logo was finished in dark gray, giving it a professional and austere appearance.

In 1909, Audi introduced two nearly identical emblems. The former looks like a huge number "1" coming out of a sphere half-hidden behind a black triangle, pointing downwards. The word "Audi" is written in narrow white cursive on a black background. In the latter case, the original Audi font has been changed to white cursive with thick, smooth lines along the top line of the geometric figure.

In 1932, a prototype of the Audi Circle appeared, with four equal-sized rings arranged in a "one" and linked together, each painted with the logo of one of the four brands, Audi, DKW, Horch, and Wanderer Motors, in blue.

In 1949, the Four Rings logo underwent a major simplification. This simplification removed the branding from the emblem and replaced it with a very slender horizontal rectangle that crosses the circle in the center, creating a clean and modern visual effect. This new logo is topped with a capitalized sans-serif inscription that stands out and contrasts with the clean lines of the horizontal rectangle and the circle. The design of this new logo retains the recognizability of the Four Rings brand while giving it a new, modern image for the future.

In 1969, the Auto Union officially changed its name to Audi, which led to another change in the logo. This time the rectangular banner in the logo was removed, making the whole emblem more simple and modern. The Audi emblem, now consisting of four thIn 1969, the Auto Union officially changed its name to Audi, which led to another change in the logo. This time the rectangular banner in the logo was removed, making the whole emblem more simple and modern. The Audi emblem, now consisting of four thick blue rings connected to each other, displays a tightly knit symbol of strength and confidence. These four rings not only represent Audi's excellence and craftsmanship as an automobile manufacturer, but also convey Audi's strong confidence in its future development and unlimited potential.During the same period, Audi also introduced an oval logo with the word "Audi" in customized sans-serif bold white lettering placed inside a solid black oval.

In 1978, the original black oval was given new life and it became even more striking. The original black became brighter with the addition of a vibrant red color, and the addition of a thin double white and red outline added layers and dimension to the shape.

In 1995, the four rings were combined with the word "Audi" in the form of four silver three-dimensional ring symbols with bold red lettering directly below.

In 2009, the logo was changed once again, with the four circles enlarged, the word "Audi" reduced and placed in the lower left corner of the circles, and the typeface changed to the traditional sans-serif typeface, with a slightly lengthened shape.

In 2016, the logo went through a simplification. All three-dimensional effects were eliminated, the iconic symbol was rendered in solid black and no longer contained additional letters. At the moment, the four rings leave more space in the overlapping areas and glow with a stronger and sleeker vibe.