1974 VW Beetle specs -- 1641 cc -- 100.1 cu. in. -- 1.6 L -- 46 BHP. Regarding the aerodynamic design, there is still a considerable amount of wind drag on the trailer at normal highway speeds. I, personally, would not depend on the top part of the VW's chassis being capable of withstanding the pressure and force generated by towing the trailer over a period of time. Just my thoughts.