The new 911 Turbo will keep the same 3.8-liter horizontally opposed six cylinder engine as previous models, but it will have a new boost thanks to a complex tri-turbo setup similar to what BMW is using in the M550d xDrive and X5 M50d models, among others.
The system employs one smaller turbocharger and two larger ones. The smaller spools up more quickly at lower rpms, delivering an initial power boost that carries smoothly into the second and third larger units.
Although the horsepower ratings aren’t certain yet, the new system is expected to boost the 911 Turbo from 495 to 525 horsepower, which is quite close to the 530 hp 911 Turbo S.
Porsche is currently completing testing on the tri-turbo setup inside their 991, though further details can’t be that far off given that it’s slated for the 2013 model year.
GALLERY: 2013 Porsche 911 Turbo spy photos
[Source: Auto Car]