It's a normal speed in Germany. And yes, driving that fast also drains a gas tank very quickly. Not sure why GP is surprised -- an ICE car will also perform much worse than advertised at those speeds.
People with expensive german cars usually go 220kph up to 280kph if they are pushing it. Doing 300kph on safe straight sections is not unheard of, but hard to pull off due to traffic.
I didn’t have to tank for the round trip, but I decided to tank on the way back cause in Austria tanking is much cheaper.
My car isn’t particularly new, but the lowest I’ve seen it use is 4.5l/100km and at 180-190 it uses 6.5l/100km.
In Germany most people don’t drive huge SUVs. Mine is a relatively sleek station wagon.
Reducing the aerodynamic surface of cars significantly improved fuel economy.
Yes, pretty much. I wouldn't say 1.5x is a constant factor.
If I drive at 200+kph (e.g. 240kph) then consumption explodes.
This stuff must be online somewhere, but for me at least it seems that consumption increases exponentially (e.g. x^2), which makes sense since air resistance increases with v^2.