We have just received some breaking news courtesy from an internal BMW memo that confirms our original speculation. The names of the models in the X6 lineup were not created because of some marketing plan. The xDrive50i and xDrive35i may have some competition in the amount of (nomenclature related) weight added to the rear of BMW models in the not so distant future.

Here ‘s an excerpt from the internal BMW memo:

Due to upcoming U.S. regulations in effect for Model Year 2009, we are changing some of our naming protocol.The new naming protocol will affect all products that currently have an engine displacement designation within the name—X3, X5, X6, Z4 and Z4 Coupe.

With that quote one can only imagine what other names we will see! What do you think they will name the Z?