# torque vs rpm

**URL:** <https://forums.speedlife.net/t/torque-vs-rpm/186672>\
**Category:** PittSpeed Automotive\
**Created:** [December 7, 2006, 4:01pm UTC](https://forums.speedlife.net/t/torque-vs-rpm/186672 "2006-12-07T16:01:23Z")\
**Posts on this page:** 1\
**Showing post:** 13

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**Author:** ![fmfkid250](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/fmfkid250/32/5973_2.png) [@fmfkid250](https://forums.speedlife.net/u/fmfkid250)\
**Post date:** [December 8, 2006, 10:12am UTC](https://forums.speedlife.net/t/torque-vs-rpm/186672/13 "2006-12-08T10:12:25Z")

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> [@OFFICIAL Buffalo Sabres Thread](https://forums.speedlife.net/t/official-buffalo-sabres-thread/25170/3664):
>
> Just to throw out a quick example, let’s assume that both of these motors have a very flat torque curve.
> 
> Motor A (bigger, lower redline) tops out at 45mph with a 3.09 final drive. (final drive = rear end)  
> Motor B (smaller, higher redline) in tops out at 45mph with a 4.10 final drive.  
> Motor A makes 400 ft/lbs. Motor A has about 1236 ft/lbs (final drive x peak torque) moving it forward.  
> Motor B only needs to make about 300 ft/lbs (1236 / 4.10) to accelerate just as hard off the line.
> 
> There’s other ratios at work here, namely tire size and 1st gear ratio, but i’m assuming they’re the same for this discussion.

it looks like your confusing gear ratio with  
stroke and bore

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