The design brief called for a signicant change to the design of the front grille, the effect was to significantly alter the unique look of the car. There were no other external body work changes.
The automatic gearbox was moved from steering column mounted to be placed in the same position as the manual gearbox, which became the stanFard on all later Aston Martins.
The De Dion rear axle was changed for a solid beam rear axle. The original engine which ran on Solex carburettors was removed and replaced with a higher performance DB6 unit with three SU carburettors. There was no doubt a significant change to the performane of the car with this later setup.