Deeper in both directions than it appears in this photo, and largest in the segment. With space for two more cylinders, the four doesn't come close to filling the engine bay.
So roomy and comfortable, why pay much more for the 5? The new 3-Series looks even more like a slightly smaller 5 from this angle.
Driver-oriented interior. Infotainment display looks like it retracts, but it doesn't. To tell the new 3 apart from the 5, look at the area where the headlights meet the grille.