The Lagonda 2.6-Litre is an automobile produced in the United Kingdom by Lagonda from 1948 to 1953. It was the first model from that company following its purchase by David Brown in 1947 and was named for the new straight-6 engine which debuted with the car. The so-called Lagonda Straight-6 engine was designed by Walter Owen Bentley and would propel Lagonda's new parent company, Aston Martin, to fame.