the nodding donkey:
Yes Carryfast, if you google you can find examples of diesel powered speedboat. But unlike you, I do not rely on google, but actual hands on knowledge.
Your ‘hands on knowledge’ trumps reality.Fast diesel is a bit more than a few ‘examples’ from speedboats to large sports motor yachts ( and E Boats ).
Remind us what were the supposed large differences that you described diesel v petrol.