Fundemental car question

[Unit 5302]

There is more to torque than just compression ratio and displacement. The compression ratio is only part of the cylinder pressure.

If everything else was equal between the two engines (which is impossible) the 351 would develop 1.1% more torque than the 347.

Bore is more of a component of displacement than stroke, and thus, it is more important than stroke in the overall torque of an engine. The only problem comes in when you have an existing engine, increasing bore is much more difficult than building a stroker for it.