[mpd]

> Audi (example): letter (car/SUV/race car)+ number (quality: 1-cheap, 8-luxury) - BMW: first number is a quality class, two numbers is the Engine size. - Mercedes: first letter is a quality class, number is the engine.

You need to already know the brand to know this.

> (quality: 1-cheap, 8-luxury)

How high does it go? If they decide to turn it up to 11 tomorrow, is 8 still "luxury"?

I can't agree that this sort of versioning is any more transparent.

> (e.g. The Audi r8 and the a3, the 90k speakers and the 1k set)

This means nothing unless you already know the brand. There's going to be a minimum set of knowledge required to understand these versioning schemes.

[reitanqild]

There's going to be a minimum set of knowledge required to understand these versioning schemes.

Growing up in Europe seems to be enough wrt to Audi.

I'm not interested in cars but I have still picked this up somehow. Same with BMW.

[jacobush]

This. They have been doing this for decades. Also Audi "8" something is equal to BMW "8" something.