I want to compare a number of things, including rear seat room, between a 2015 Audi A3 convertible and a 2018 Audi A5 convertible. The stuff I'm getting from CR, Edmunds and Car & Driver either isn't complete or doesn't seem to make sense. C&R shows the A5 rear seat as smaller than the A3, which can't be right. Audi doesn't go back to 2015. Edmunds' site is really annoying now, with panels and ads that don't move AND just drops rear seat data for 2018 aside from one item. I could go to the dealer, but am afraid that will result in me buying a car because dammit, I love my Audi and just want a bigger, newer one. TIA.