I think the car/boat comparison gets off track due to the use of multi speed transmissions in cars.
Yes today's cars get great performance with less displacement. Much of that comes from improved valve train and injection technology. The delivery of that performance requires gearing. Does anyone recall cars with a two or three speed automatic? Now it's 6, 7, 8 or a CVT.
I'd like to see some torque curves on the engines in question.
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