In Reply to: BMW Naming System (long) posted by ChrisM on September 23, 1999 at 09:11:37:
: I am wondering how BMW chooses the names for the different series. 323 vs. 328 vs. 330 makes sense but I am wondering about the letters that follow... I have seen older 3-series coupes with an "is" (liki 323is) on the back. I have leared that means "sport" but then how does that differ from the sporting packages that are offered on the new 3-series. In other words, why not call a new coupe (with sports package) a 323csi? I know that is stretching it... the 635csi was one of my favorite bimmers so that is why I ask.
: Does anyone know how BMW chooses these codes. Why all of a sudden include the "c" for the coupes when was only used previously on the 8-series.
In the US, BMW has used "i" for 4 doors and "is" for 2 doors AS A GENERAL RULE OF THUMB on E30 and E36 models. The "CSi" designation has been around longer than just on the 8er, the E24 6er and the 3.0 series also used the "C" designation for coupes. Apeears BMW is going back in their heritage.