My Passat wagon TDI will top 100, if I use the aforementioned long downhill windy stretch.

Only done it once though, just to see. It was not a very secure feeling at that speed. Very floaty, not to mention loud as hell. Up to about 90 or so, it'll cruise all day. Over that, and I want some upgraded suspension, and wider wheels all round.

Maybe I've just been driving on the crowded East Coast too long. I used to cruise up and down from Glasgow in my Dad's Saab at over a ton all the time. Felt quite normal to hit 130 occassionally.