I would say 747-400 and A340 that are really beautiful.
The Pilatus PC6 turboporter, Cessna O2...
ATR 72...
For the design I like many russian planes, my favourite fighter is the Sukhoi 27 Flanker but I also like particular designs like the A10...
It's hard to choose. Design (visual aspect), the way it flies, the equipment / weaponry in some cases...
And for the car (it's the title of the topic after all) :
Mitsubishi Lancer Evolution (no weaponry

)

