This is a completely new chassis. It’s the same F3X platform as the current sedan. The interior they show is exactly the same plus all the crazy leather work, which I guarantee will all come off in production.
They’re definitely calling it the 4 series. The same way our 1 series coupes will become the 2 series. 1 and 3 will be left for the 4 doors.
They’re just filling gaps left and right to throw whatever they can into the line. Then they step on their own toes once they make a 6 series Sedan and call it a “Grand Coupe”
I won’t ruin this thread by posting the ghastly 3 series Gran Turismo…yech