Forum Discussion
wilber1
Jun 24, 2015Explorer
ShinerBock wrote:
Inline six engines are generally under-square(long stroke) due to most inline six's having a tall block. However, that is not the case for every inline six. Some old Toyota Supra inline six engines were over-square (short stroke) which is why they were able to get such high horsepower due to their higher revs. Likewise, some V engines are under-square and get their torque down low and have low max engine speeds. HAVING TORQUE AT LOW RPM HAS NOTHING TO DO WITH THE FACT THAT IT IS AN INLINE SIX. This is a FACT!
For practical purposes it does. Large displacement I6's need to be under square or their blocks and crankshafts will become excessively long. That is why you don't see many high performance I6's and the ones you do aren't bigger than 3 litres, including your Supra example and BMW straight sixes.
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