Dennis C

As a new 991.1 TTS owner, I have a quick question for the group as I try to learn more about these cars. Is the engine in the 991.1 TTS different from that of the 991.1 TT in any way other than software changes? In other words, have any internal engine components been upgraded or changed in the TTS cars, or is it exactly the same engine with different software?

It doesn't really matter very much; I will most likely not modify my engine. I'm just curious.

Thanks.

Hothonda

Exactly same engine/everything - only software on the TT VS TTS '14-'16.....

See below ↓↓↓

RE: '14 (incl '15 & '16) Turbo v TURBO S

Excellence Magazine article - 12/13 issue (pp 62) interview w/August Achleitner, director of 911 product line - stated that the 991 thicker piston crowns compared to the 997 Turbo were changed in the 991 Turbo to withstand "greater combustion pressure" w/no change in in the 9.8:1 compression ratio.

Additionally goes on to say the '14 Turbo S motor is mechanically unchanged from the base Turbo, relying purely on an ECU software remap for its extra power & torque.

Dennis C

Thanks!

Dennis C

Another question as I continue to learn about these cars: How is the PDK transmission different in the 991 TT compared to the 997 TT? Is it different at all? I've read about improvements and upgrades that aren't specific to the TT, but I'm curious about what has changed in the TT. I've spent quite a bit of time behind the wheel of a normally aspirated 991 PDK car, and I thought it was great. I haven't driven a 997 PDK car. I drove a Macan with PDK, and that wasn't anything like the 991.

I'm not trying to start a debate about whether the newer PDK is "better" than the older PDK, I'm just curious about incremental improvements that have been made as the 911 continues to evolve.

Thanks for any information on this.