Power = torque * rpm / 5252. If you have flat torque and a redline 20% of 5,252 rpm, for example, power will be greater than torque by also 20%.

 

Here's a good video to watch for a very basic reasoning of Evora Stock engine (Bore/Stroke/RPM) vs Racing engine. Go to time between 7:20 and about 9:00 min.

 

I have that team jersey. Those guys were great. And they were this genuine with me. I killed myself for being in sandels that day! They wanted to strap me in for some laps but I did not have the proper equipment on me.
Closest thing on the street to an Indy car. Nay sayers need to watch this. Thanks for the memory of one of my favorite days at LRP!!!

It was a huge shame this program dissolved in its infancy. Potential was huge.....with another 50hp. You heard about the void from a lack of a CEO...that hurt!

 

Another reason is torque is robbed from the engine to run the supercharger. Torque always runs lower on supercharged engines.

 

Could be in the tune as well to protect the trans. More boost bypass or less timing at lower RPMs?

 

Torque = Horsepower * 5252 / RPM
= 400 * 5252 / 6800
= 308.94 ft-lbs

Based on that equation, to increase torque you need a bigger numerator which would be more HP. But you said HP is fine so the other way to increase torque is with a smaller denominator which would be less RPM.

 

And why in the world would you want less rpm, haha.
Trying to move the power down creates more torque but also more cylinder pressure which exacerbates knock. RPM is your friend when fighting knock, so the simple answer could be that, for some markets with lower octane, they are limited by the torque they want to make so more power means rpm. Geared and shifted accordingly, there’s minimal downside and the upside is cooler noises.

 

I have heard the torque the trans can handle is a limiting factor when building the Evora for more power. Not sure if this is the reason Lotus stopped where they did for the Evora / Emira?

 

This is interesting to read.

My 4C has a big turbo and it does take a good second+ to spool up unless you're in the revs, but when it comes on, it's strong.

My wife's S4 is a 3.0L supercharged V6 and the power is VERY linear. Interesting to know that the Emira will have that same type of power delivery.