Katie59 One reason cars, including the mini are bigger are because of the increase in safety requirements in cars compared with when they were first made.
I am no expert onthis subject but roll bars are now mandatory and aother structural changes to how they are built. which nherently makes any new car larger than manay were 30 -40 years ago.
But the real growth in car size has been in the introduction and huge growth in the sales of 4 x 4s, their imitations and SUVS, which are designed to be as big and as heavy as possible for vanity reasons. Wehave run good old fashioned estate cars for 40+ years because we need their carrying capacity. They were big cars when we first owned them, but now they look tiny beside these vanity vehicles, which are not even good load carriers. Our hobby used to be antique dealing and for that there is nothing to beat a good old fashioned Volve or Saab. Dealers with 4 x 4s always need trailers unless they deal in jewellry or something small.