I see this name mentioned often on here. Is "Portfolio" a different model,( higher/lower) or the actual name of the XK that most people don't use ?

 

This is a good place to start to review past trim levels:
https://www.carsguide.com.au/jaguar/xk
Sadly, the wikipedia page isn't well maintained.

 

The 4.2L XKR Portfolio was the top-of-the-line, limited production model in 2008 and 2009 with unique colors, trim, and wheels. All 2008s were Celestial Black with Cremona wheels and all 2009s were Shadow Gray with Selena wheels.
https://www.jaguarforums.com/forum/x...ertible-45154/

My 2009:


Portfolio was a trim option on 5.0L models (I'm not sure which years).

 

My 13 Portfolio came with active exhaust, chrome mirror caps (ugh), chrome Orana wheels, Alcantara trim and Portfolio trim on the lower siderails. lus a $4k upcharge. Why did I buy it? I bought a new 13 in 2016. It was one of three in the USA and I got a whopping 40+% discount off of the sticker.