The Lamborghini 400 GT 2+2 was introduced at the 1966 Geneva Auto Show and was designed to replace the earlier 2 seater Lamborghini 350 GT and 400 GT Interim. The principal changes were to the body, especially the roofline, which enabled the installation of the +2 seating in the slightly enlarged cabin, and some mechanical improvements including a new full synchromesh gearbox. Like its predecessors, the 400 GT 2+2 was of critical importance to Lamborghini in providing the lucrative sports and grand touring car market with a credible alternative to Ferrari.