It came to me as a surprise when Road and Track tested the new 6 speed 997.2 TT and the acceleration times are almost identical with the 997.1 6 speed times:

2010
http://www.roadandtrack.com/content/..._COVsprcar.pdf

2008
http://www.roadandtrack.com/tests/co...sche-911-turbo

Chevrolet Corvette/Nissan GT-R 2010/2008/Porsche 911 Turbo 2010/2008 (May 2008 issue)

The results:

0*–120 mph 9.9 11.5 12.7 11.4 11.5
0*–110 mph 8.5 9.6 10.5 9.8 9.9
0*–100 mph 7.3 8.0 8.6 7.9 7.9
0*–90 mph 6.1 6.6 7.0 6.7 6.8
0*–80 mph 5.2 5.3 5.7 5.7 5.6
0*–70 mph 4.4 4.3 4.5 4.2 4.2
0*–60 mph 3.5 3.3 3.4 3.5 3.4
0*–50 mph 2.9 2.5 2.6 2.8 2.7
0*–40 mph 2.3 1.8 1.8 1.6 1.5
0*–30 mph 1.7 1.3 1.1 1.2 1.0
0*–20 mph 1.1 0.8 0.7 0.7 0.6
0*–10 mph 0.4 0.3 0.2 0.3 0.2

However on multiple comparisons, the PDK 977.2 TT RULES!

One example:

http://www.autobild.de/artikel/merce...i_1168909.html

http://www.autobild.de/artikel/2-2-s...ch_921964.html

The results:
<table class="t2 fachlex space-3col " height="310" width="479"><thead><tr><th rowspan="1" colspan="1">R8 vs SLS vs 997TT PDK vs 997TT Tiptronic
</th><th rowspan="1" colspan="1">
</th><th rowspan="1" colspan="1"></th> <th rowspan="1" colspan="1"></th> </tr></thead><tbody><tr> <td rowspan="1" colspan="4" class="fett"><table class="t2 fachlex space-3col "><thead><tr><th rowspan="1" colspan="1">
</th> <th rowspan="1" colspan="1">
</th> <th rowspan="1" colspan="1">
</th> <th rowspan="1" colspan="1">
</th> </tr></thead><tbody><tr> <td rowspan="1" colspan="4" class="fett">Beschleunigung</td> </tr><tr> <td rowspan="1" colspan="1">0–50 km/h</td> <td rowspan="1" colspan="1">1,5 s</td> <td rowspan="1" colspan="1">1,9 s</td> <td rowspan="1" colspan="1">1,5 s 1,3 s
</td> </tr><tr> <td rowspan="1" colspan="1">0–100 km/h</td> <td rowspan="1" colspan="1">3,9 s</td> <td rowspan="1" colspan="1">3,9 s</td> <td rowspan="1" colspan="1">3,3 s 3,5 s
</td> </tr><tr> <td rowspan="1" colspan="1">0–200 km/h</td> <td rowspan="1" colspan="1">12,0 s</td> <td rowspan="1" colspan="1">11,1 s</td> <td rowspan="1" colspan="1">11,1 s 12,0 s
</td> </tr><tr> <td rowspan="1" colspan="4" class="fett">Zwischenspurt</td> </tr><tr> <td rowspan="1" colspan="1">60–100 km/h</td> <td rowspan="1" colspan="1">2,0 s</td> <td rowspan="1" colspan="1">1,7 s</td> <td rowspan="1" colspan="1">2,0 s 2,0 s
</td> </tr><tr> <td rowspan="1" colspan="1">80–120 km/h</td> <td rowspan="1" colspan="1">1,9 s</td> <td rowspan="1" colspan="1">1,8 s</td> <td rowspan="1" colspan="1">2,3 s 2,2 s
</td></tr></tbody></table></td> </tr><tr> <td rowspan="1" colspan="1">
</td> <td rowspan="1" colspan="1">
</td> <td rowspan="1" colspan="1">
</td> <td rowspan="1" colspan="1">
</td> </tr><tr> <td rowspan="1" colspan="1">
</td> <td rowspan="1" colspan="1">
</td> <td rowspan="1" colspan="1">
</td> <td rowspan="1" colspan="1">
</td> </tr><tr> <td rowspan="1" colspan="1">
</td> <td rowspan="1" colspan="1">
</td> <td rowspan="1" colspan="1">
</td> <td rowspan="1" colspan="1">
</td> </tr><tr> <td rowspan="1" colspan="4" class="fett">
</td> </tr><tr> <td rowspan="1" colspan="1">
</td> <td rowspan="1" colspan="1">
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</td> </tr><tr> <td rowspan="1" colspan="1">
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</td></tr></tbody></table>Is it possible the PDK and its launch control are the major difference in acceleration results compared with the old 997.1 TT, because with the same gearbox there doesnt seem to be a difference with the 3.6 and 3.8 engines.

What do you think?

 

Those that have dynoed 997.2 PDK say they have ~ 480 whp (EVOMS Mustang) which is 40 or so more than 997.1 6sp. I dont know about the .2 6sp (actually didnt know you could still get a 6sp but I have not paid close attention)...

 

I read somewhere that 997,1 is faster than 997,2 from 200-300...Can somebody recall that?

 

I recall it being said but it makes no sense that a car with less power and a lesser gearbox can sudden turn an acceleration deficit around above a certain speed.

 

There has not been a head to head comparison between the 997TT and the DFI/PDK 997TT. The information being discussed here is based on two separate runs from SportAuto, tested on two different days.

According to SportAuto, the DFI 997 Turbo takes 31.1 seconds to travel from 200-300 km/h - September 2009 SportAuto

The 997 Turbo took 28.8 seconds for the same velocity range.

 

Seems unlikely that a stock .1 6sp car is as fast as a stock .2 6spd. For starters the .2 has a larger and more powerful engine.

 

I think you will need more than one test to draw that conclusion. However, who knows how many 6 speeds will even be tested. Or how much effort Porsche put into the 6speed Turbo at all, knowing that most all of them sold would be PDK. Will have to also get both on the dyno to see what they are really making.

 

The turbo max boost pressure with sport chrono etc. is 0.2 lower in the 3.8 TT, so its not all increase!

Usually they try their best at road and track to get the most out of these cars.

 

Actually the information discussed here was from road and Track, and the PDK/Tiptronic was from Autobild Sportcars (Nothing to do with Sport Auto!)

The Autobild inforamtion was only taken for reference, besause there are not many tiptronic tests around to compare, and in any test in any weather the PDK is faster than all of the rest (including 6speed and tiprtronic). Most of the 2007 tests were made with 6 speed manual.

The thing that we are talking about, which is surprising, that the 6speed 997.1 and 997.2 were equally fast in ROAD AND TRACK TESTS, WHICH was REALLY surprising to me and suggests the 3.6 and 3.8 engines perform similarly, maybe due to the fact the 3.8 has a lower max turboboost?

I have also heard that these machines with AWD are really hard to dyno, as EVO magazine and Teknikens Värld in Sweden had trouble of getting reliable dyno results due to the AWD reacting badly to the dyno.

NOT saying that the 3.8 is slower, just raising a conversation based on observations on 6speed manual comparisons in Road and Track.

AND to comment on your comparison on separate dates, the Nissan GT-R times were also tested on the same date 2008/2010 and if you look carefully above the 2008 gt-r was substantially slower pointing to the fact that the weather in 2008 was not better than the weather in 2010.

 

LOL, I was not responding to your original post.

The numbers I quoted were in response to the two prior posts by skandalis and mhh, questioning if the 997.2 was slower to 300 km/h. R&T/Autobild did not reach that velocity in their testing...because no one else responded, I posted the quoted time is from September 2009 SportAuto.

 

LOL, missed that completely....

 

Perhaps gearing might have a role in that...

 

The short answer is yes. PDK shifts incredibly fast, the car never falls out of boost.

On pump my car makes about 580 rwhp. My friends PDK ran me pretty even from 40-130, I started pulling slightly above 90 mph.

I had to run a bit of race gas and turn up the boost to put him in his place

The PDK is a freakishly fast car, the only stock car that can out accelerate it is the Veyron.

 

Got to love it!!! My next addition to the stable.

 

PDK isn't the only reason, but based on data from Road & Track (using a manual 997.2 Turbo) and Car & Driver (PDK), the differences in times when a shift occurs can't be ignored.

R&T vs C&D
30-40 mph: 0.4s vs 0.6s
40-50: 1.2 vs 0.6 (manual has a shift)
50-60: 0.7 vs 0.6
60-70: 0.7 vs 0.7
70-80: 1.5 vs 1.0 (manual has a shift)
80-90: 1.0 vs 1.0
90-100: 1.2 vs 1.2
100-110: 1.8 vs 1.4 (manual has a shift)
110-120: 1.6 vs 1.5