The F10 sold so much better than the E6*.
So expect a subtle design without to much fuzz.
The G3* will be a great car, as previous 5 have been, can't wait to see it.
And as for the engines goes, i'll take a I3 petrol please, the sound of the I8 was really impressive.
As for release, expect the G30 in 2017, and the G31 in 2018, BMW usually maintain a 7 year lifespan.
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3 series: E30: 89 325i, E36: 92 325iC, 94 320iC, 96 320i Convertible, 94 320iaC, E46: 99 320ia, E90: 06 318i Le mans, E91: 07 318dt
5 series: E39: 97 520ia, 01 530Dat, E61: 09 520Dat
X series: E83 05 X3 2.0d, E84 10' X1 2.0 X-drive DA, F25 13' 2.0da X-drive.