Here is one of the classic Bentleys. I know close to nothing about cars, but it was very beautiful!
There was also a Bus museum, featuring historical buses and other vehicles used in London. There was also a BOAC bus.
I was surprised to learn that the Brooklands site was Britain's largest, and one of Europe's largest, aircraft factories during the WW1 to WW2 eras. Many, many aircraft (18,000+!) were built here. British Aircraft Corporation built 30% of the airframe of all BA & AF Concordes at Brooklands.
This museum was like an avgeek's dream come true. I'm so happy to have gone! Highly recommended, especially if you can snag a spot at one of the exclusive Concorde events.