an automobile chassis and a one - piece body integrated into a unitary structure , and a method for fabricating , assembling and integrating the chassis and body . the body includes interior panels , a cockpit , an engine enclosure module , and an underbody . the chassis / body structure , comprised of a single type of aluminum alloy and a single type of thermoplastic , is resistant to high - stress loads and is substantially recyclable into industrial - quality constituents . a first preferred embodiment includes a body rotomolded from a reinforced polycarbonate , polycarbonate / abs blend , or polyimide thermoplastic , seven aluminum alloy bulkheads , and stacks of thin - wall aluminum honeycomb - cell panels embedded in an unreinforced foam of the thermoplastic . a second preferred embodiment includes a body rotomolded from a reinforced liquid crystal polymer thermoplastic , seven aluminum alloy bulkheads , and stacks of thin - wall aluminum honeycomb panels . a third preferred embodiment includes a body rotomolded from a reinforced polycarbonate thermoplastic , seven aluminum alloy bulkheads , and aggregated sub - assemblies of polycarbonate micro - honeycomb blocks having cells filled with a foam of the unreinforced polycarbonate thermoplastic .