Hello Triggy, welcome,
I would love to ask fiat why they designed such a flexible engine with low end torque, blueprinted air manifolds, big valves for high swirl and then fitted it with a low ratio 4000rpm/70mph gearbox. I think it could easily do 70mph at 2500rpm.
Anyway its a good engine, beware the steel sump rust though, if you want to avoid a £1000 bill paint it quick with hammerite mine only lasted 6 years.
All the best, John