I was just thinking of this after I read JoeyM's door hinge thread. He posted a pic of something (don't know what it was) that looked way old to me, and used it as an example of a " '30s car." I tend to think of '30s cars as the beginnings of aero designs, lots of art deco & swoopy fenders, but that decade didn't start that way.
1930 Ford:
1940 Ford:
Big difference!
Same idea here, but more recent. I owned both of these Celicas let me tell you it felt like they were about 30 years apart rather than 10:
1980
1990
On the other hand sometimes a company just seems to stagnate over time...
1990 Ford:
2000 Ford:
What do you guys think was the biggest change in cars over a decade?


1960 Ranchero:
1960s vehicles were in many ways the beginings of the modern era. Look at pony cars: the fundamental overall size, proportion and configuration have remained constant for almost 50 years. A '57 Chevy OTOH is an altogether different beast.
1970 Austin Mini
1980 Austin Mini
1990 Austin Mini