P.S. I think it's telling that Porsche wasn't mentioned almost at all in English until the mid 1950s, given their role in the war!
https://books.google.com/ngrams/graph?content=Ferrari%2CLamb...
Up until about 1948, Porsche was a pure development contractor mostly for the government. They only started manufacturing cars under their own brand in the early 50s (a few 356 built basically in a shed notwithstanding) after Ferry Porsche had taken over, and with the introduction of the 911 began a meteoric rise as a volume manufacturer for international markets.
As to why Koenigsegg doesn't get the rep, I'll take the outside opinion that it's because their name is too inaccessible whereas "Bugatti" slips easily into rap lyrics.
Ferraris, Porsches and similar are somewhat attainable, which, I think, helps with their being symbols, since most people have already actually seen them and know they're real. A Koenigsegg is as good as a story. Hell, I live in Paris and I've never actually seen one. Porches and Ferraris? They're seemingly everywhere.