A 2001 Chrysler Neon, thought I think it was topped at 190. I was a stupid kid back then. Today, I still often drive above the limit, but not in a stupid way. For instance, back than, I'd drive 100 km in the city on 50km/h streets filled with parked cars; no idea if anyone will come out between two cars! Today, in such places, I go at 50, sometimes even less, minding the surroundings. But then again, on some select wide boulevards, I can drive 110 even if the limit is 70.
As for the highways, I've driven on "no speed limits" high ways in Germany that weren't much different then many of the highways we have here in Canada. So, I don't always agree with the posted limits in Canada. I believe it comes down to the experience of the driver and what they are driving. For instance, with my vehicle today, I never pushed it further than 165.