With all respect to the prior models of the 911 turbo, Porsche is all about improvement in every aspect, but especially dynamically. They do not design turbos for drag racing, although they put power down better than just about anything and my bet is that on a road course the 997.2 would have a tough time hanging with a 991 TT/TTS.

 

Oh yes Porsche make our 991 turbo s slower than our old 997 tuned turbo Next one will be slower again and they keep doing this so old P car owners don't get too upset....which is a kind gesture from porsche

 

 

I was being sarcastic. Getting on a forum and asking if the new Porsche 911 will beat the old one in a race is pretty... um... obtuse.

- Patrick

 

And the 991 TTS is slower than a base 997
because the 997 is faster than 991

 

It appears very normal behavior for past model owners, typical happens when lots of money becoming hosed on mods to try get it faster, so in the mind the new one is always slower and inferior. Problem then becomes for older car it only goes in a straight line a little faster but not so good in corner, or anywhere else either for that matters.

 

This is a very true and many will believe till the bitter end....or until they "pony up" to the new one and then mind changes immediately... and then old one is called no good any more

 

This roll racing stuff really misses the point. Why not just buy a dodge hellcat?
The 991 turbo is much quicker around the track than a 997.2 turbo. That's what it was engineered to do. I think the 991 is actually slower 0-60. The changes and improvements are in the suspension and aerodynamics. The best roll cars are the platforms that will max out hp. At the moment, the 997.1 platform probably best facilitates that, although the .2 destroys a lot of cars with minimal effort.

 

Maybe not:


http://www.popularmechanics.com/cars...ntury/?slide=1

 

There are variations in each car. But generally the 997.2 Turbo S 1/4 mile trap speeds have not been matched by the 991 Turbo S.

It was also interesting to finally see a 991 Turbo S dyno on Cobb's mustang dyno. It did 436/461 AWHP/TQ. To contrast, my 997.2 bone stock made 501/536 AWHP/TQ.

Cobb's dyno of stock 991:
https://www.6speedonline.com/forums/...bb-tuning.html

My stock 997.2 dyno at Cobb:
https://www.6speedonline.com/forums/...d-today-4.html

 

not sure where you're getting that data.


from reviewing those threads, the stock 997.2 was at 485/520


and the 991 on 93 was at 451/568. you listed the 91 data, which would be expected to be considerably lower.

 

The stock baseline for the 991 Turbo S on 91 was 436 HP


My stock baseline for the 997.2 Turbo S on 91 was 485 HP. I was looking at the uncorrected graph of 501 sorry.


That's a 49 HP difference on the same dyno both cars bone stock on 91 octane.


There are variations on each car. This is not going to be the case for every 997.2 and every 991. But for now, this seems to be the only data points for a stock 997.2 Turbo S and stock 991 Turbo S, both on 91 octane both dyno'ing at the same place.


So to answer the OP's question...if these two cars did a roll race the outcome assuming equal drivers would clearly favor the 997.2.

 

considering the stock tune is for 93, I think comparing 93 dynos would be much more valuable.

running 91 is like comparing a race tune with 93 - not what it was intended for.

 

That makes no sense. We get 91 octane in California, not 93. These are California cars. Porsche's largest market in the world is California. The stock tune is for 91 octane, not 93 octane. Yes they will make more power with higher octane but so what.

We have the only apples to apples comparison that we know of. Both cars bone stock. Both cars on the Cobb dyno. Both cars on 91 octane. 997.2 Turbo S makes 49 more AWHP than 991 Turbo S.

 

Dyno numbers are cool we can talk about whose car has more HP on the Dyno, All dyno's are not the same. If you take 2 dyno's exactly the same you will get different results from the same car. In the end its just bench racing it really doesn't matter, all that matters is who crosses the finish line first. So if that finish line is a track or an airstrip, it is what it is. Who wins either style of race if the vehicles are stock, I would guess a 991. Modified 997.2 have been smoking the 991's in roll racing but there are limited upgrades available on the 991 ( in the US anyway ).