Are you looking for "options" or "trim levels?" And if "options," which - specifically?
It sounds as though you're looking for powertrain options, so here's a partial. Everyone else feel free to add to (or correct!) this as needed...
1984-1985 XJ
- AMC 2.46L/150ci four-cylinder
- GM 2.8L/173ci V6
- Renault 2.1/126ci turbocharged Diesel four-cylinder
I believe the gasoline engines had the option of either a BW T5 manual or a Chrysler 904 auto, I don't know what the Diesel had behind it. The Dana 35 rear was highly common, with the D44 a rare option. The fronts were all Dana 30.
1986 XJ/MJ
As 1984-1985XJ. First year for the MJ/Comanche pickup
1987-1990 XJ/MJ
- AMC 2.46L/150ci four-cylinder (RENIX)
- AMC 4.0L/242ci inline six-cylinder (RENIX) (front clip redesigned to accommodate longer engine. GM V6 last used for MY1986.)
- Renault 2.1L/126ci turbocharged Diesel four-cylinder (to mid-1988. Ended with ChryCo involvement.)
The 150ci four got either the AX-4 (four-speed) or AX-5 (five-speed) automatic, while the 242ci got the Peugeot BA-10/5 until mid-1989, then got the AisinWarner AX-15. The AW4 four-speed automatic became common. The Dana 44 rear axle became even rarer, and stopped being offered as an option with the Chrysler takeover of AMC production in mid-1988. Fronts were still Dana 30, and non-44 rears were Dana 35. Some C-clip versions of the 35 started to appear.
1991-1995 XJ, 1991-1992 MJ
- AMC 2.46L/150ci four-cylinder (ChryCo OBD-I)
- AMC 4.0L/242ci inline six-cylinder (ChryCo OBD-I)
- No domestic Diesel option
- VM Motori 2.5L turbocharged Diesel used in Europe and overseas markets.
AX-4/AX-5/AX-15/AW4 use behind gasoline engines continued. Some "fleet model" XJs (usually listed as "X1") got the 32RH/32RE three-speed gearbox - I don't know why. This was rarely taken as an option, apparently. Dana 30 still used up front, Dana 44 non-existent. Rear could be Dana 35 or ChryCo 8.25 - could go either way (although ABS guarantees the presence of a D35 - the 8.25" was never used in an ABS application.) 8.25" axles were "early" 27-spline units, I don't think that started to change until 1999 or so (can someone confirm or correct?) Later axles were 29-spline. D35s could be C-clip or not C-clip (both are "semi-floating" axles,) while I'm inclined to believe that all 8.25" axles were C-clip units. Aftermarket gear selection limited to 4.56:1 for the 8.25", at last recall.
1996 XJ
- AMC 2.46L/150ci four-cylinder (ChryCo OBD-II)
- AMC 4.0L/242ci inline six-cylinder (ChryCo OBD-II)
- No domestic Diesel option
- VM Motori 2.5L turbochraged Diesel used in Europe and overseas.
AX-4/AX-5/AX-15/AW4 continued, with AX-4 being supplanted by AX-5 (if it hasn't been by this time.) "Police option" appeared as well - using the 242ci, AW4, speedo calibrated to something like 130-140mph, and having an "extended idle" switch (to ramp up the idle when sitting for long times, to increase alternator output to run lights/radio/whatever.) Last year of "old" body style - starting in 1997, the XJ had a bit more "finished" look with the edges rounded off slightly. Taillamps and headlamp bezels/front running lamps were also changed for 1997, but the 6054-style headlamp was still used through 2001.
1997-2001XJ
As for 1996, but with "newer" body style.
Production ended with MY2001, and production of the 242ci I6 ceased with MY2007 WJ and TJ. The AMC 150ci engine was also found in Dakota pickups until sometime around 2002, when it was replaced by the DaimlerChrysler 2.4L/148ci four-cylinder. The AMC242 was the last AMC engine in production, lasting some nineteen years longer than the company (the two before that were the AMC 2.46L/150ci until 2002, and the AMC 360ci V8 in the SJ until 1991-1992.) The 8.25" changed over to slightly larger 29-spline shafts sometime around 1998-1999 (?), but still retained the critical flaw - a C-clip retainer design.
Trim levels didn't have much to do with options, other than being an option itself. For instance, the early "Laredo" trim level featured chrome bumpers, mirrors, door handles, and trim - but could come with either an auto or a stick (I have an 88 Laredo with a stick, and had an 89 Laredo with an auto.) Limiteds were "power everything," but I've heard reports from the field of Laredos sometimes having "power everything" as well (making the only real difference between a PE Laredo and a Limited the leather seats and body-coloured trim on the Limited.)
Known trim packages were Base, Chief (AMC-era), Pioneer (AMC-era, I think), Laredo (early), Limited, Sport (later), and Classic (later). This usually governed things like seat material, steering wheels, trim colours, and the like - with little effect on powertrain (except for the Limited coming - almost invariably - with the 4.0L and AW4.)