In Germany the speed limit is frequently much lower that that, and driving faster than about 80 mph (130 kmph, called richtgeschwindigkeit) incurs increased liability even on the autobahn without any speed limits.
In my experience not many drivers cruise at speeds of 100 mph (160 kmph). The richtgeschwindigkeit is much more common.
I see that, too. It's not even 130 km/h it's often between 100 and 130 km/h. Depending on the speed limit, traffic, lanes available and routing I would say that there are about 5-10% of cars that go faster and maybe 20% that want to go faster but cannot because of traffic.
I would agree with a general speed limit of 160 km/h. If you drive around conurbation area "Ruhrpott" you rarely have the chance or aren't allowed to go faster than 100 km/h.
Personally I've set my car to alarm me on 200 km/h, just to remind me, that I'm about to do something stupid. When someone is with me, they are also alarmed because it's the usual cockpit beep that tells you, something important popped up like engine failure or tire pressure.
I once drove a Ford Focus with an electrical speed limit of 160 km/h in place because it was a company car. But because of this I ended up in a dangerous situation where I was overtaking a slower car that started accelerating. With enough engine power I could accelerate faster up to the point where the limit kicked in and we were at the same speed. As usually I've monitored the situation behind me and I've noticed that there were faster cars approaching.
In conclusion I was mislead by the engine to have enough power to handle the situation with ease but the electric limit just cut it of. My foot said: There's more available, but the car suddenly locked it away.
Stupid situation. yes. In driving school they teach not to accelerate when someone is overtaking you. Of course this rule changes a bit on the Autobahn, but in this case, speculative driving forced the cars behind me to hit the brakes which is weird when you think that everything will be fine because the slower car just accelerates and overtakes. Stopping the maneuver of all sudden and let the car on the right lane pass you again is is the worst outcome for everyone behind you.
That's why I suggest to not limit the car's acceleration curve so the driver notices that the engine is on its limit. Rather I would implement an audible signal at 160 km/h and a repeating signal for over 190 km/h. Because to be honest: It's rarely possible to drive that fast for just a minute.
I would also suggest to get these street legal racing machines like Audi RS-models off the road. There's absolutely no sane use for such overpowered cars on public roads.
And finally: Company cars should be limited or regulated in some way. Most aggressive and fast drivers seem to be representatives. They don't pay the high prices for fuel and don't care about wear of the car (especially brakes).
In my experience not many drivers cruise at speeds of 100 mph (160 kmph). The richtgeschwindigkeit is much more common.