If we were to compare one mass-produced vehicle to a cheetah, we might pick the newly-unveiled Porsche 911 GT3 RS, which just made its anticipated debut at the 2015 Geneva Motor Show.
In one fail swoop, the newest 911 reaches 0 to 60 in about 3.1 seconds and tops out at 193 mph, which is impressive for the rear-drive, naturally-aspirated model. A 4.0-liter flat-six cylinder engine delivers 500 horsepower and 338 lb.-ft…