When I'm looking for pre-war cars, I prefer to use this site. It's very detailed technical information on each make. Mostly Soviet, US and German cars, trucks and bikes. There are a few post-war cars there as well.

http://www.autogallery.org.ru/gal.htm

Great web site:
http://www.uniquecarsandparts.com.au/index.html
I use it when evr I need the years for Aussie cars, but has almost every car under the sun-very usful for getting years and chassis codes