# How each engine really differs.

**URL:** <https://forums.speedlife.net/t/how-each-engine-really-differs/258912>\
**Category:** Shift518 Automotive\
**Created:** [June 13, 2011, 2:56pm UTC](https://forums.speedlife.net/t/how-each-engine-really-differs/258912 "2011-06-13T14:56:07Z")\
**Posts on this page:** 1\
**Showing post:** 4

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**Author:** ![Cossey](https://avatars.discourse-cdn.com/v4/letter/c/3ec8ea/32.png) [@Cossey](https://forums.speedlife.net/u/Cossey)\
**Post date:** [June 16, 2011, 4:59am UTC](https://forums.speedlife.net/t/how-each-engine-really-differs/258912/4 "2011-06-16T04:59:39Z")

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> [@HAPPY BIRTHDAY MICAH](https://forums.speedlife.net/t/happy-birthday-micah/43056/4):
>
> Are you disagreeing that engine with identical torque curves will have identical hp output?
> 
> Keep in mind, only TQ is measured, HP is calculated.

Mostly the last part. Doubling the rpm the vehicle can rev to will not double the power. Look at x car’s dyno and see if the hp is 1/2 peak power when the rpms are 1/2 of peak power rpms.

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