Mmmmmmmmmm....... its not fair really to compare a diesel to a petrol car. The front end is far heavier on the diesel along with the other beefed up components. yes the Focus had a rep for good handling, still not sure why you would want to throw a diesel car around like you would the more nimbler competition. Maybe its just me but, we drive on rubbish country roads in Norfolk......... cos there is nothing else here ....... but thats another gripe for another day......and yes the C4 can get unsettled, but there again I would expect it too, however, there is a difference between slinging the car round bends and negotiating potholes and other country fare on the road, eg dirty tractors crapping all over the road, lorries dumping diesel, potholes, cracks, settlement, dead animals, loose gravel etc to worry about. I like to "make good progress on the road", we all do, so try not to pull the HDI C4 apart too much, eh?