My E93 has a ski bag for carrying long items. I can't speak for skis, but I was able to carry a dozen 5/8" x 5 1/2" x 6' fence boards in the bag with length and width to spare. The ends wind up resting on the center console armrest, but since they're in the bag, they don't dirty up the interior at all.
Based on that, you should be able to carry 190's at least, and I don't see why you couldn't carry four sets of skis, so long as you remove the boots from them and arrange them carefully.
Any idiot can be fast in a straight line. The corners are what separates the drivers from the commuters.