I'm definitely talking about the S (4-door sedan), shown in Fashion Island, Newport Beach, CA. Granted, the Ghibli is tighter than the XJR, but still not as impossible as the Model S.
I don't need to lose weight, but inches from my spine and legs to fit the roadster (spine, at least, to fit the Model S). I managed to stuff myself into an Elise when they were first introduced, but my head was firmly against the roof panel, and the steering wheel was pressed so hard into my thighs that I could not turn it.
I'm an ex-linebacker (6'4", 275 lbs). There are a couple of inches at the waist, but that doesn't bang my shoulder and head against the top of the door frame on the Model S, when I try to get in.