Was it on a motorway, "dangerous" A road, or built-up area?

IIRC it was on the A1, early hours in the morning, and only 104Mph,
in a Vectra. I've driven a vectra at an indicated 145mph, and they
are a safe, stable, capable car.

Yup, even my old Cav V6 sat at 140 like it was just doing 70.
In comparison to the turbo, which sits at 70 like it's doing 140

Indeed - a mate of mine's recently bought a 2.6 Carlton (saloon) and whilst
it's no rocketship off the line, it's very happy sitting on the motorway at
120-130mph.

Peter