What's the fastest you've ever been in a (land-based) vehicle?

[kartone]

Car: 1985, 270kmh for 4 minutes, Porsche 928S (manual), italian autostrada
Motorbike: 2004, 151mph for 0.5 minutes, Susuki Hiabusa, Pennsylvania Turnpike USA. 

[Davidm1600]

Well, I suppose I too can fess up here, re my years of unbridled but unlawful fun in the past, and can therefore say hand on heart that I have seen on more than one occasion 200 + in er um my work vehicles on perfect driving roads, under perfect conditions with no other vehicles on the same road as I was at the time. I am good boy now and of course don't do that sort of thing any more. 

However, I also recall doing 220km on the back (pillion rider) on my brother in laws Ducati 900ss some years ago, oh and of course quite legally 230km in my cousin's Audi A8 over in Germany (he was driving) and being passed by Porsche 911s doing an easy 250Km !!