Porsche will bump up the horsepower for the revamped 2017 911 Turbo and Turbo S sports cars that it shows next month at the Detroit auto show. Both models feature powertrain improvements that increase top speed.
The 3.8-liter, twin-turbo, flat six engine powering the Turbo gets a 20-hp bump to 540 thanks to redesigned intake ports, improved fuel injectors and boosted fuel injection pressure.
The 2017 Turbo S is rated at 580 hp, up from 560. The model has new turbochargers with larger impellers that have variable geometry. The engines in both models also have a dynamic boost function, which, Porsche says, reduces turbo lag and improves response by maintaining turbo boost pressure even when the driver takes his or her foot off the accelerator.
"This is achieved by interrupting fuel injection, while the throttle valve remains partially open," Porsche said in a statement. The Turbo S coupe is expected to reach 60 mph in 2.8 seconds, making it 0.1 seconds faster than the 2016 version. Porsche says the top speed is up 7 mph to 205 mph. The Turbo, meanwhile, is expected to hit 60 mph in 2.9 seconds with a top speed of 198 mph, up 2 mph from its predecessor.
The Turbo S has a redesigned front end with LED lights and side air blades that give it a look resembling the 911 Carrera.
Porsche says the 2017 models will go on sale in April, with prices starting at $159,200 for the Turbo coupe, while the Turbo S convertible will start at $200,400, excluding shipping, which has not been announced.