Apropos of nothing...
In the early Seventies Sir Alec Issigonis worked on a steam engined Mini project.
The car was featured a long time since in a long-forgotten "Car" magazine article, which I have never been able to locate.
Mention of the steam Mini is made in the two Issigonis biographies by Gillian Bardsley and Jonathan Wood, but apparently the project was scuppered by technical problems, and Issigonis' apparent lack of enthusiasm (even though he was passionately interested in steam engines, and built his own extensive model railway.)
What's more back in the late Nineties 'Mr Performance Mini', John Cooper, recalled this very project in one of his monthly articles for 'Mini World' magazine. Mr Cooper thought the Steam Mini project bizarre in the extreme, but related a discussion he had with Dr Alex Moulton, the engineer who conceived the Mini's rubber suspension, and the Flexitor, Hydrolastic and Hydragas suspensions.
According to John Cooper, Dr Moulton was hugely keen on the idea of a steam engine for automobiles, but his knowledge of steam engines was not called upon by Issigonis after he'd fallen out with Dr Moulton following the Leyland takeover of BMH in 1968.