In Germany, and many other countries, engine displacement is a crucial factor used to determine vehicle taxes and insurance.
For instance, the BMW models we get here start at x28 or x30. There, they start at x16, x18. Those model designations have been perverted by marketing and don't correlate to actual displacement like they used to, but you get the idea.
As a luxury brand, the models sold here all have a minimum spec that is higher than in other places as well. Cloth seats, manual windows (when they were still made), and things of that nature were the standard base spec, and many of the features we expect, and consider standard, are options there.
The cost of obtaining a driver's license is at least $2,000, and takes longer; they don't hand them out like Halloween candy to anyone with a pulse, like they do here.
Combined with fuel taxes, and vehicle inspections, the cost of owning and driving a car requires a serious commitment.
One result of the more rigorous licensing requirements is that most drivers actually understand, and heed, the concept of lane discipline.
The free-for-all approach here would not work on the Autobahn, or the even the Autostrada.