If you have a sports car you are supposed to suffer a little from the cold, heat, rain, drafts or a poor ride etc. Thats why they have GT cars, more comfort and a lot more practical. Compared to some Lotus' we are in the lap of luxury. Some GT cars add a lot more hp to overcome the extra weight. So you could say a n/a XF is an underpowered GT car or a gussied up low powerd sports car.
I am using the term GT as in Grand Touring.