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I don't think you can really quantify that the OHV configuration is any more reliable than an OHC. It depends on the manufacture, not the configuration. Any garden variety car can go 200k+ with regular maintenance, and there's a lot of other turbo motors that can support crazy power levels. A Supra instantly comes to mind.
But, I don't think many would argue that an OHC is a much smoother configuration. When I think great engine, I think of something that puts a smile on my face. A thrashy 3800 doesn't make the list. But if you bolt on a turbo or SC it helps even things up.
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‘07 Mazda RX8
Past: 911T, 911SC, Carrera, 951s, 955, 996s, 987s, 986s, 997s, BMW 5x, C36, C63, XJR, S8, Maserati Coupe, GT500, etc
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