Car-Guy
Give me a museum and I'll fill it. (Picasso) Give me a forum ...
Just because an engine is a little bigger doesn't mean it is more powerful. Example, in the MoPar engine line up that you asked about, a 6.4L (~392) engine typically turns out just under 500 horsepower, while the smaller 5.7L (~350) gives just under 400 horsepower. Both are "naturally aspirated". However in the middle is their 6.2L (~376) engine which cranks out 700+ horsepower, but it's supercharged. All of these engines have "variants" that affect HP ratings but those are generalized/base numbers. All other things being equal (weight/gearing/design/tires/drivers) then it's horsepower that will make your vehicle quicker and faster.On the subject of the modern Mopar Hemis, does anyone know how the bigger ones (376, 392) compare to the base 5.7 (345, I think?) My 2012 Ram has the 5.7 and it's decent, but also a pretty heavy vehicle and not geared all that aggressively. I haven't driven a Charger or Challenger with the 5.7, except around in a low-speed test course at the Carlisle PA Chrysler show years ago, but I'm sure in a lighter car, it would be a major improvement. But, is something like a 392 really THAT much quicker?)
But it's really not that simple, since too much HP has it's own unique set of challenges, most of which can be overcome, but that's a different discussion.
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