On the rear of XJ40 Sovereigns the badge just said "Sovereign". Others said "XJ6" (maybe also on some models it said XJ6 3.2 S or something) but I'm not really sure). With the X300 and X308 Sovereigns also had "Sovereign" badges, there also models like "XJ Executive" or "XJ Sport" (and some had "XJ6" and "XJ8" badges) but I'm not sure if it's worth putting that as the model name in those cases. But with the XJ40, the brochures seemed to divide the range into XJ6, Sovereign and Daimler (and remember by that time Daimler was just a luxury trim level, not a separate company) and Sovereigns looked different to XJ6 models with their rectangular headlights (instead of circular quads). But they still had 6 cylinder engines (V12 didn't come along til 1993)

1990 XJ40 UK Brochure - XJ6, Sovereign and Daimler:

http://www.jag-lovers.org/brochures/bro1990a.html

UK Brochure for X300 range - XJ6, Sovereign and XJ12 models

http://www.jag-lovers.org/brochures/96bro_jld-10-01-96.html

UK Brochure for XJ Sport and XJR (X300):

http://www.jag-lovers.org/brochures/xjr95.html

UK Brochure for XJ Executive (X300):

http://www.jag-lovers.org/brochures/xjexec96.html

X308 (facelift of X300 with V8 engines) UK brochure:

http://www.jag-lovers.org/brochures/bro1998/98a_b_l.jpg

For the X350 range (released in 2004) in this brochure they've put "XJ6 Sovereign" and "XJ8 Sovereign", although I think the boot lid badge on this just said "Sovereign":

http://www.jag-lovers.org/brochures/xj/2004_xj8_2_priceguide_l.jpg

But at the moment I'm just talking about renaming the XJ40 range.

Brochure index for this site:

http://www.jag-lovers.org/brochures/section_xj.html