Guys, I am not talking abou carburated V-8s here... And I never said the 70s. Jeez....
My comments strictly are relative to the post odoption of Fuel injection, O2 sensors, distributorless ignition, and Electronic engine managment which was somewhere in the mid to late 80s, and maybe early 90s for some name badges.
Other than those advancements, the only significant ones I can think of are power related, not fuel economy.
And if you honestly beleive "The proof that engines are getting more efficent is in the hp/displacement ratios" has to do with fuel economy, you are kidding yourself.
Banging things up and down harder and spinning them faster in a reciprocating engine wastes more energy, not conserves it.
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I am a Commodore PET --- Now get off my lawn you kids...
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