[dparm]

Something that I've noticed about BMW: many of their motors have 0.5L of displacement per cylinder:

I-4s are 2.0L
I-6s are 3.0L
V-8s are 4.0L
V-10s are 5.0L
V-12s are 6.0L

There are a few exceptions, such as the current turbo V-8 that's 4.4L, but in general they adhere to the sizing I described above. Even their upcoming I-3 is 1.5L.

Is there some benefit to that "magical ratio"? Or is this done for ease of manufacturing/engineering, i.e. parts sharing? Audi does it a bit too.