[fuddman]

Originally Posted by Jason

That would actually be reverse of the naming conventions going forward. It's clear that BMW's plan is to name all sedans/touring/hatchbacks/GTs with odd numbers, while all coupes/convertibles/gran coupes get even numbers.

Here's a model map:

1 Series = three and five door hatchback, upcoming GT (based off Concept Active Tourer)
2 Series = upcoming coupe, convertible, gran coupe (all based off the 1 Series)

3 Series = sedan, touring, GT
4 Series = coupe, convertible, possible gran coupe (all based off the 3 Series)

M3 = sedan
M4 = coupe, convertible, and possible gran coupe (all based off the M3)

5 Series = sedan, touring, GT
6 Series = coupe, convertible, gran coupe (all based off the 5 Series)

M5 = sedan
M6 = coupe, convertible, gran coupe (all based off M5)