The fasted ive been its 140mph down the motorway in my old 98 scenic 1.9 dti, got so scared that as soon as i reached that speed i thought, ok best slow down now
i was pretty impressed it managed to reach that didnt really struggle
But I'll answer anyway, 110mph, in my old 1.0 Vauxhall Corsa! Not bad for a 1 litre, but I had to slow because it didn't sound too good. If I'd kept going, the engine would have blown!!