If you're talking about the entire coast (CA-1) from the Redwoods all the way down to LA, that would be much, much more. It would take you about 17.5 hours just to drive the coast from SF to LA, which is why recommend 2 days to drive that section alone.
The last time I went from SF to Crescent City via the coast, I took 2.5 days, and while I wasn't in a hurry, I wasn't spending large amounts of time at any one location either.