So I've come to the conclusion that breaking cars down into various parts and analysing them individually, is the best way to understand the type you're trying to draw.
I think I need to get out and do some car drawing irl too. This book and google ref is great, but scale and weight still eludes me!
I've attached a page that has a few lines that I really like. I think I'm finally starting to understand construction for these guys. This coming week I'll be studying a sports car, should be fun! :D