Miley Cyrus Soccer Mom in Training ... In New $80,000 Porsche

1114_miley_cyrus_porsche_X17Engaged pop star Miley Cyrus embraced her inner Hollywood soccer mom and got behind the wheel of the minivan of sports cars ... a Porsche Cayenne GTS in L.A. on Tuesday.

We're told the 19-year-old had the luxury vehicle -- which has a base price of over $80,000 -- delivered to her home recently.

It's a great starter car for any filthy rich bride-to-be.