Never actually, technically rode in it, but I did get to sit in a 1906 Darracq. This was built for speed (Darracq held the land speed record when this was built), and needed two people for it to be driven. One to "drive" the other to be an engineer. Complicated is a word I would use, with no oil pump or fuel pump as we know it a hand powered pressure pump was used to supply fuel and oil. Oil worked on a constant loss system. It was huge. Something like a 14 litre four cylinder engine. An earlier model had a 25 litre four cylinder engine. A friend of mines uncle was restoring it (the Bob Beardsley in the linked article). The engine had been used, so I was told, in one of Donald Campbell's Bluebirds.
https://nzmotorracing.co.nz/2016/02/04/dixon-and-darracq-to-feature-at-leadfoot-festival/
Just found these clips of it being driven.
Oh, and the drivers name is Anne.
And I understand it has been slightly modified to be more user friendly ...