2015 Jaguar F-Type R vs 2015 Porsche 911 Carrera S
Porsche will be off to a powerful start in 2016 when the 2017 911 Turbo and 911 Turbo S make their world debut at the North American International Auto Show in Detroit in January. The top-of-the-line 911 models will be available in both coupe and convertible body styles and are equipped with engines offering 20 horsepower more than before, a sharper design, and enhanced features. The 3.8 liter twin-turbo six-cylinder engine powering the 911 Turbo now develops 540 hp. The increase in horsepower is achieved through modified intake ports in the cylinder heads, new fuel injectors, and higher fuel pressure. The 911 Turbo S now makes 580 hp thanks to new turbochargers with larger impeller. In addition to a higher maximum torque (553 lb.-ft. in overboost compared to 523 lb.-ft. on the Turbo), the Turbo S also has a higher redline (7200 rpm instead of 7000). Porsche is still the only manufacturer to use turbochargers with variable turbine geometry in gasoline engines.
The engines now also have a dynamic boost function, which improves throttle response during spirited driving. It maintains the boost pressure during load changes – i.e. when the accelerator pedal is briefly released. This is achieved by interrupting fuel injection, while the throttle valve remains partially open. As a result, the engine responds to changing throttle applications with practically no delay. The effects of this function are particularly pronounced in the Sport and Sport Plus modes.