The Porsche 911 Turbo is currently undergoing final testing before it's launch at the Frankfurt Motor Show in September. The 991 version of the Turbo will be four wheel drive and will possibly have three turbos to smooth out the power delivery and even out torque across the rev range, which explains the enlarged air intakes ahead of the rear wheels.
Power is up from the 997 Turbo's 500bhp (and the Turbo S's 530bhp) to around 550bhp, which should be a fraction higher than the Nissan GT-R's 542bhp and the Jaguar F Type S's 490bhp (although expect a F Type RS with 550bhp at some point).
The 911 Turbo test car in the photos is equipped with adaptive cruise control (the giveaway is the radar under the number plate) and ceramic brakes.
Thanks to Budda for the tip.
