The Daimler Majestic Major DQ450 is a large luxury saloon produced by Daimler in Coventry, England between November 1960 and 1968. It was fitted with a 4,561 cc V8 engine and was offered as a much more powerful supplement to their then current Daimler Majestic.

Daimler V-8 engines were designed for the Daimler Company by Edward Turner and produced from 1959 to 1969. Initially used in the SP250 sports car and the Majestic Major saloon, the engine was mostly used in the Daimler 2.5 V8 saloon made with Jaguar Mark 2 unit bodies from 1962 to 1969. Approximately 20,000 of the 2.5-litre version of the engine were made for use in the SP250 and the 250 saloon, while approximately 2,000 of the 4.5-litre version were made for use in the Majestic Major saloon and its limousine variant which remained in production until 1968.