Turboman
Mab An Gov
Sorry guys but I totally disagree with your comments on original spec engines. I've got a 2.25 petrol with overdrive. It's reconditioned Turner engine. I'd never contemplate driving on a motorway with a 30+ year old vehicle that struggles to cruise at plus 50 mph, yeah you can push it harder but it's simply not designed for that kind of sustained speed.
I used to tow trailers long distance with my bosses 109, just a standard 2 1/4 diesel. On one occasion, we loaded a broken down series on a flatbed in Brum, and towed it to Egham, Surrey.
Foot flat on the floor all the way down, didn't seem to do it any harm at all.
No idea how fast I was going, the speedo was all over the place.