In reply to cfer:
Once came across a couple who had adapted the rear of their car to take their two bikes upright side by side. Rear seat removed and installed brackets to attach their bikes to. All they did was remove the front wheels and the bikes went in and held upright using the bikes own front spindle on a brackets fitted to the floor of the car. Was very neatly done with the "new" floor of the rear of the car all carpeted out.
That was some 8yrs or so ago. They must have been ahead of the times
.