I dont think the P5 is that bad? I think its like driving a blomonge most of the time?
They fitted so many rubber bushes, doughnut tyres, springy padded thick leather seats etc presumably to make up for the tough suspension? Of course its a thick metal heavy tank. Remember this was a world market car, designed to go all over good or bad roads?
My old Beetle has great bouncy suspension. An original mini is like riding on a wash board. The Morris Minor I had was bouncy but comfy. Thinking about it all my classics were the same?
Cars today have gone the other way. Thinner fitted seats but tighter smoother suspension, however as metalwork is biscuit tin like, it doesn't absorb those shocks as well as a P5. They stick sound proof pads everywhere to offset but always to cost.
In the Motor road test of 7th October 1967 they say ' Only in such matters as the ride on rough surfaces and a certain imprecision of the handling when pressed hard, does the basic chassis design show its age.'
I certainly find that my lovely coupe does not ride very well on the rutted roads of Sussex, even with new shock absorbers. She enjoyed the far better Scottish roads, though.
Totally agree with your comment Iagain. On smooth roads and highways the ride is fine. The suspension was designed for cross ply tyres and these do ride smoother but the handling especially in the wet can be lethal.