No, no, NO!!!! V engines are EVIL. of the Devil!! BAD!!!
Merlins??? AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAGGGGGHHHHHHHHHHHHHHHHHHH!!!!!! Make the bad noise STOP!!!! Only thing worse is a jet engine. I must ritually cleanse myself now ....
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Was that over the top dramatic enough??? Seriously, who doesn't love the sound of 4 Merlins?
BUT ....
Having now successfully hijacked this thread away from Lugnuts (my week is complete

), I have to award *Ultimate Victory* to Wally for his brilliant and devastating invocation of one of the greatest engines EVER --- Charley Allnut's power plant of the African Queen ...
“there ain't nobody in Central Africa but yours truly knows how to get up a head of steam on The African Queen.”
...
BUT ...
I will accept a flag on the play as the African Queen's engine is not technically an internal combustion/Otto Cycle (in Thermodynamic terms) but a Rankine Cycle engine ... And I believe that we, in keeping with the spirit of this site, are talking about Otto/Diesel Cycle engines here ... Just sayin' ...
Top THAT, Jerry!

I had to take Thermodynamics 3 times in college, so I know these things

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Want to know more about a D-type steam boiler?? I'm your man!