If silent travel is chief among your
priorities for an ecofriendly vehicle, the Audi A8 hybrid is not for
you. There isn’t much in the way of quiet, electric-only operation,
which makes sense, of course, given that this isn’t a fully electric
car. (You can run solely on electrons for about two miles at a constant
37 mph, and if you awaken the engine, EV mode will reengage
automatically