Quite, Liz. Spot on.

And "Doing the ton" when I was a lad meant driving at 100 mph, which was regarded as a rite of passage by many and was terminal for quite a few. 100 kph is the routine rural speed limit in Oz so doesn't have quite the same cachet (or attract the same expression) and 160 kph doesn't exactly roll of the tongue either.

Cheers, Rowan