Yes, 112 km/h is the "not very high" that I mentioned.
In Belgium it is 120 km/h, in France 130 km/h, and loads of small cars use highways at these speeds (or more). The Suzuki Swift work as well as others for that. But I agree that for long trips it is not as good as bigger cars: driving a small car on highway for 1h is much more tiring than a bigger car with better sound isolation, handling, etc.

Unlimited highways are only in Germany, and this concerns only some parts of their highways, not whole network.
Also some (or all?) in Italy have a 150 km/h limit.