What do you mean, 'quality in what way'? The plastics feel and look nicer, the trim is of better quality, typically instead of cheap plastic 'metal look' trim items, they could use real metal, better quality leather, better quality feeling switches, a neater looking and better functioning dash i.e. control layouts, probably a quiter cabin when on the motorway.
The list is endless, and tbh the Mondeo isn't exactly cheap ourdays.
So a few better touches inside the cabin justify the big price differences? What about the rest of the car? Thats why I asked quality in what way, as its rather vague to say the car is more quality or better than the other, as there are more than one ways of being better.
Whilst I agree with you that an Audi will have higher quality materials used inside than a Ford, I can't agree that it somehow justifies the price difference. Of course you would expect some price differences as one is using materials that cost more and are worth more, but then a car has many other characteristics too.


