The Morgan Plus 4 is a more powerful and, in the case of the earlier cars, slightly longer version of the Morgan Motor Companyâs 1950 4/4 model. It was made between 1950 and 1969. The Plus 4 represented a major step forward in the evolution of the Morgan sports car. Although the traditional chassis layout was retained, the frame gained in both wheelbase and track dimensions while being considerably strengthened. The 2 seater was the most sporty and popular version.