Just thought I would throw in that there was a 1929 Bentley with a Napier Lion engine in it down at the Goodwood revival meeting. Thats a three bank 24 litre V12 (three banks of four). Although I got to look all over it, I didn't hear it run (straight pipes too). They had a race for Brooklands cars and it was raced in that. It must have been awesome when they fired that up right next to you in the pits.
Didn't they ever use these engines for generators, or some other excuse to get one to a stationary engine rally ?
Steve