I noticed in one of Michael's letters to Mary Hodgson on the database, he writes to her about going to see a used Italian car for sale that can get up to 60 horsepower (wow!) Later on, there is a story in the audio files about one of Michael's friends visiting him and then getting his fingers crushed in Michael's car door.
Nico also has a story on the database, in the audio files, of having his car volunteered for Winston Churchill's election campaign.
Where were these cars stored? From what I have read, Adelphi Terrace didn't exactly have ample parking available. Would the cars have been around Campden Hill Square? And what happened to them? If the cars were gifts to the boys, surely the boys would have kept or sold them at some point.