To ensure we are speaking using the same nomenclature, K1 is referring to model year 2001 in my verbiage. (mechanics.stackexchange.com)
It's allegedly because the marketing types reckon this car's sheer size - you can get it in both short and long wheelbase versions - limits its outright sportiness in comparison with the XKR and XFR, and possibly because the whole «R thing» may now be under review, given that Honda and Volvo, among others, use much the same nomenclature. (autocar.co.uk)
In the US, Amazon lists the Kindle Fire HD change as a «limited time» offer, though it's worth noting that B&N has used the same nomenclature for its own discounting. (slashgear.com)