After Aston Martin had rejected alternative proposals for the DB5 from Touring of Milan, the decision was made to focus on their own development car, registered, 4 JMC. The wind tunnel tests, which began in February 1965, showed the work was necessary to counteract the tendency of the car to lose traction, the wheel speed. Thus, the final development phases saw a DB5 chassis, suitably lengthened and titled MP 219, a rear wing and tail shortened Kammback that Aston Martin had previously incorporated in sports riders. The decision was made to produce MP 219 as the Aston Martin DB6 although its Dion rear axle was replaced by an axle to reduce costs.

Presented at the Motor Show 1965 Aston Martin DB6 is remarkable that the first model to be changed following a move from Feltham factory in Newport Pagnell. Opposite, the DB6 looked almost identical to the DB5, the biggest difference is in the rear panels that incorporate Kammback. The tail, combined with the rear axle moved, and 3.75-inch (95 mm) longer wheelbase, offer more stability at high speed. Although the rear end-Kamm design style was similar to the Ferrari 250, it has not been popular with buyers when the DB6 was introduced. [Edit]

Other items to include recognition of the return of ice-front quarter panel of a door, an oil-air intake at the bottom of the front end, quarter-shocks at each corner and a total length of the DB6 has increased d 'about two inches.

Other notable changes:

      * Raised roof line by two inches
      * More legroom for rear passengers
      * Largest raked windshield
      * Before Split and rear bumpers
      * Wheels with Chrome Standard
      * Steering Optional
      * Air conditioning optional
      * Standard ZF five-speed unit and a manual or optional Borg Warner three-speed automatic transmission available at no additional cost

Another major change from the DB5 to the DB6 was the abandonment of the construction technique full designer Superleggera by Touring of Milan. For most of the construction of the DB6, the most common body on-frame technique was used, which is mainly attributable to the rear view require a more robust and more rigid with frames bending sheet.