I agree with Delis on this. Jap cars
Delis, Zermans are not much better either. Especially the older ones.. When it comes to handling and stability, you can only trust the Italians and the French.
My 147 feels quite stable and accurate at 160 but at the 180 also. I also have 15" pirellis and i find the car quite stable at high speeds. I find the suspension too soft at low speeds, but when you press the pleasure pedal, it kind off transforms itself and gets stiffer.
Capri, if you feel yours unstable, maybe you need new shocks or tyres.
I m not sure if lowering will help cornering, it will definetely help at track use, but in the uneven roads things get worse, especially at high speeds. I woudnt trust cornering with 170Km/h with a lowered car. A sudden bump can land you off. Especially if the lowering is done by third vendors.
A suspension guru who was working at a racing team, told me once that almost none constructor makes serious tests on every car for the suspensions they make. They just calculate the new values, make the product, and sell it. No time and money for state of the art suspension tuning. He also said that nobody takes more care than the car manufacturer. Better solution on most cars is keeping the factory springs and get adjustable shocks. Lowering springs are in most cases cosntructed without any special research.
He said that it happened many times, the car they were trying to tune, to be faster with the factory suspension. Aftermaket systems felt more stable and accurate and made the driver feel safer, but when they measured the track times they found out that the factory setup was quicker eek! He also said that there are aftermarket solutions that work better, but this is rare. Go figure..