Today I took my old 16" x 205's winter alloys/tyres to a courier depot to send away to the new owners and all 4 fitted into the boot no problem.
I then went to the local BMW dealer to pick up my new 18" x 245's winter alloys/tyres to take home, and they would NOT all fit into the boot.
I had to drop the wife and one of the kids off at the bus station, to take the bus home, then go back for them