The Lotus Mark VIII car was Colin Chapman’s first fully enclosed aerodynamic design. Chapman's basic requirements for the design were for a car of 1100 lbs powered by an 85 bhp engine and a maximum speed of 125 mph. Work began on this design in late 1953 and Chapman was assisted in the design of the body by the aerodynamicist Frank Costin, who was the brother of Mike Costin, his main collaborator.