Today, I watched "Ford v Ferrari" and I think classic cars are cooler than recentmodern cars.

Technically correct and very understandable -- a native English speaker would use the word 'modern'

I like their round-shape headlights and their curved body, like the Shelby AC Cobra.

I wish automobile companies sell aold cars which inside machines are latest ones and exterior is classicalith modern components and a classical exterior.

I have tried to correct this using the terms you used but I think it will be most helpful to just show you how an English speaker might say what you are trying to say :)