Why does a Porsche Flat 6 with 256 cu in able to push 500 horsepower, while the AMC 258 Flat 6 in my Jeep barely hitting 100 horse power? The Porsche flat 6 feels right at home up to 8000 rpm, while the AMC 258 is screaming by 4000. Why can do engines with very similar blocks be so different performance wise?
I am talking about naturally aspirated of course.
In: 3
Because all you are looking at is displacement.
There are a lot of factors that effect the power output of a motor. Displacement is only one of them. Another important factor is compression and stroke length. There is also the machining to reduce internal resistances, valve placement/design, porting, exhaust design, intake design, and ECU mapping.
Maximizing the performance of all of these takes a lot of time and effort.
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