Let's consider a higher-displacement engine with a more undersquare profile, compared to a square or overquare modern downsized one, it would still not surprise me at all if the older one could match or even surpass the efficiency of its more up-to-date counterpart.
Quote:
Originally Posted by BLSTIC
Do you think a detailed old-school engine with modern bolt-ons could match a non-DI factory built engine of the same size for economy?
|
Probably. At least here in Brazil, when Volkswagen and Ford set a joint-venture for Brazil and Argentina and shared engines, some cars that resorted to a Renault-derived 1.6L engine from Ford which retained a pushrod valvetrain got better mileage than the ones fitted with the 1.6L VW EA827. But anyway, when it comes to old-school tech, I honestly see no reason for pushrod engines to fall into oblivion, and eventually a flathead could be improved too.