As far as I can tell, the e24 only came with a 3.25 diff ratio. Early or late, manual or auto, lsd or open. they all had 3.25:1

The e12 also had that funky rear subframe setup. Depending on the specifics, they came with either 3.46, 3.64, 3.91, 4.27, or 4.44... Login to read more.