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Originally Posted by Rennen
It's all a matter of undersquare vs oversquare engines. (I suggest most of you search google for those terms  ) |
It's not quite that simple. As stated a million times the rotating mass and harmonics have a LOT to do with it as well. If I have a huge engine for some sort of industrial application and it is oversquare, it still ain't gonna rev high because of the mass. The design of the engine has a lot to do with it as well (ie B18C is undersquare yet it still revs high with very little modification).
Anyways, it's more of the application than anything else. Auto makers put 4 bangers in smaller, lighter passenger cars and v8's in big passenger cars. They use the V8 because they need the torque down low (also why a lot of passenger V8's are also undersquare) to get those giant land yachts moving.