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Old 07-22-2012, 01:34 AM
gehmjc21 gehmjc21 is offline
Officially Welcomed to the 'Fest
Location: Upstate NY
 
Join Date: Jan 2012
Posts: 380
Mein Auto: 650i x drive retired
Quote:
Originally Posted by roadsta View Post
In the end, it is always about power.

Revs x torque = power. (In the same way that force x speed = power, in a linear situation.)

So, torque in part determines how much power a car has, but it also depends on the revs at which it can produce that torque.

An engine that produces high torque, but runs out of revs quickly, cannot keep up with one that has similar torque but can rev higher.

A classic is a Formula 1 engine - nowadays a 2.4 liter V8 without turbos. It produces lower torque than a 650 or even a 640, but it can rev to around ~20,000 rpm - that's why they still produce around 800 hp from a engine that has less displacement than many small cars on the road today.

Power is the amount of work per time unit, and determines how much energy can be converted per time unit - how much speed can be 'added' in a given time.

http://www.epi-eng.com/piston_engine...and_torque.htm

r
Roadsta, good stuff thank you!

This makes me want the dinan tune that much more
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2008 E92 335i - retired
2010 B8 S4 -retired
2012 F12 650i X drive-retired

2014 F10 - 550i X drive
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