Porsche offers an adjustable suspension plus a torque-vectoring rear end–but no all-wheel drive much like the big-brother 911 offers. Carbon-ceramic brakes? Yep, for $7,400. Serious enthusiasts will likely want so…

…two on aggressively sloped driveways, $8,520 ceramic composite brakes are required for drivers planning to track their cars for any extended period (especially 911 Turbos). 2017 Porsche 911 Fuel Economy…