I use a portable air compressor that is powered off the cigarette lighter outlet in the car. I've been using one for over 20 years now and I would never consider using a hand pump. My compressor is the simple type that you can buy at any store that sells car accessories. To accommodate the presta valves on my road bike tires, I use an inexpensive little gizmo (available at any bike store for about a dollar) that is screwed onto the presta valve and allows attaching the pump's head (which is made for schrader valves).
JEAN
2011 Specialized Ruby Elite - carbon fiber go-fast bike
DiamondBack Expert - steel road bike
Klein Pinnacle - classic no-suspension aluminum MTB