There’s more leg room up front than you’ll find in the A4 or C Class. We’re talking a couple of centimetres at the most, but that’s worth having if you’re really leggy. Anyone tall shouldn’t need to worry about the amount of head room, either. The 3 Series’ interior is also generously wide, so you can stretch out sideways as well as lengthways.
Storage space is pretty good, with a useful cubby under the centre armrest that has a USB-C socket inside. You also get partitioned door bins that help prevent loose items rolling around.
Compared to its premium-badged peers, the 3 Series has similar rear head room to the A4 but more leg room and more space all round than the C Class. The 3 Series is also a better choice for three adults sitting side by side; they’ll have more shoulder room than they would in the A4 or C Class.
Seat folding and flexibility
The standard manually adjustable front passenger’s seat doesn’t include adjustable lumbar support, but you can add that and electric front seat adjustment for a reasonable price.
All 3 Series variants come with versatile 40/20/40-split folding rear seats as standard, which you can fold down using the handy levers in the boot.
The 3 Series has a very serviceable luggage compartment. Like the A4's, it's a useable square shape, which proves slightly more useful for bulky objects than a C Class's. Should you need more space, as we’ve mentioned above, you can easily fold the rear seats in the 3 Series to leave a large, flat extended load bay, and while it’s no estate car (see our 3 Series Touring review if you want one of those), it’ll still manage a set of golf clubs or a trip to the tip.