What Exactly Determines Sport Pack XJ-S

As the second owner do not know what options original owner purchased. The car had three differences from “standard cars” when purchased by me.
They are: 15" x 7" gold plated wheels with 235/15R 55 tires.
TWR body kit with rear spoiler.
Road clearance at front and rear of 5.5 inches
So what does a sport pack include??
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Well, it’s weird that I think I remember this, but I seem to recall that the sport pak (according to my parts book which is not in front of me) had a different speedo transducer. One PN is DAC4591, not sure if that was sport pack or non sport back or if I am just mis-remembering the whole thing.

Bob