230KPH on Highway 404 north of Toronto, in an E32 740iL.
It was significantly less nervewracking than the new Mini I had floored all the way from Naples to Milan. That thing topped out at 200KPH. My buddy and I were stopping for fuel every 45 minutes.
I've also had my 1986 Toyota Celica GT-S up to 200KPH on some rough contry sideroads. That's as fast as it would go.
In my current BMW, I haven't yet exceeded 170KPH.