Hello Thierry,
Sorry to hear you are not having the best of times with your new 4/4 sport.
As you have had experience of more than one 4/4 I don't feel that I am best qualified to advise you, but I can say that my 2009 4/4 rides extremely well on most road surfaces.
I feel that my car is quite suitable for long journeys in comfort.
Where the ride quality suffers is usually on pot holed or deeply rutted road surfaces, however, I would not expect the car to be perfect on such surfaces due to it's sporting tendencies and limited suspension travel.
I hope that someone can offer you a drive of another 4/4 sport so you can determine if your car has a problem or if your expectations are higher than the car can offer.
All the best,
N-M
