My searching is not getting a definitive answer. Does anyone know for sure if the OEM 19" Artura wheels fit on a 2011 XF Supercharged (not the XFR)? And would they need any spacers to do so?

The brake rotors are definitely bigger according to the specs on Car and Driver, but the calipers look the same. The rotors are listed as an inch bigger in the front (14" vs 15") and 2 inches bigger in the rear (12.8" vs 14.8").

Supercharged specs:
2011 Jaguar XF Supercharged 4dr Sdn Features and Specs (caranddriver.com)

N/A specs:
https://www.caranddriver.com/jaguar/xf/specs/2011/jaguar_xf_jaguar-xf_2011/325170

 

Brakes on the V8 SC and the XFR are the same. I believe Artura was one of the very few 19inch wheels that fitted over the large brakes on those front rotors. But I decided in the end to stick with 20inch for my winters as I likewise couldn't get a straight answer. Jaguar lists it as fitting the vehicle if you look up part C2P14209 Eg on Harper Jaguar or others of the online jag dealer parts shops. However those aren't always perfect...

 

Thank you for posting that information. Hopefully, someone that has actually done it will chime in to confirm what you found.