Hi,
I've tried to keep your words, but I've made some changes.
Cars in N. America are built today not to need running in.
Best wishes, Clive
When I was about ten, I remember my farther had a ZAZ 968M. It had about about 40 hp, and it easily went as fast as 130 km/h when not heavily loaded. With four people inside, it accelerated up to 120 km/h. The ignition was set a bit forward, and the fuel level (mixture richness) in the carb was fine tuned.
Also, when it was new, the ZAZ was driven very gently: not faster than 60 km/h, and very slowly up hills. That lasted for the first 3000 km. Then, we drove another 1000 km with a limit of 70 km/h, and so on. As the result of this careful running in, the engine was in perfect condition.
So, I just don't understand your suspiction about the car's specs...
Also, our former ZAZ with a 28 hp engine reached a maximim of 103 km/h, better than the 98 in the specs.