The 3½ Litre (and later 4¼ Litre) was presented to the public in September 1933, shortly after the death of Henry Royce, and was the first new Bentley model following Rolls-Royce’s acquisition of the Bentley brand in 1931. This era of Bentley models are also known as “Derby Bentleys” because they were built in the Rolls-Royce factory located in Derby, England.