What are the major differences between the 2005 and the 2007 Avalon’s?
Which has the higher consumer rating?
No significant difference between them. Let condition/maintenance/price be your guide.
Also could I somehow put 225/60R-16 Continental ProContact with EcoPlus Technology tires on or is that not possible?
Also according to a website the 2005 rear suspension is strut but on the 2007 the rear suspension is a multi-link. Which is better for heaver loads?
I think the website is mistaken, they’re the same chassis, unchanged over those years. Or they might just be describing a multi-link suspension that includes a strut.
As for tires, look at Tirerack.com to see what your tire options are.