The sports car was unveiled Sunday at the Internationale Automobil-Ausstellung Mobility show in Munich, Porsche announced in a news release.
Frank Moser, Porsche's vice president of the 911 and 718 model lines, called the hybrid the "most complete and versatile form" of the flagship model to date.
The car uses a newly developed 3.6-liter flat-six engine paired with a 400-volt electric system that delivers an instant boost of power, Porsche said.
Together, they produce 711 horsepower and 800 newton-meters of torque, 61 horsepower more than the outgoing model. Torque refers to the twisting force that pushes a car forward when the driver presses the accelerator.
Porsche said the car can accelerate from zero to 62 miles per hour in 2.5 seconds, two-tenths quicker than before. It reaches 124 mph in 8.4 seconds and has a top speed of 200 mph, putting it in the league of the world's fastest production cars.
A near-production version lapped Germany's Nürburgring Nordschleife in 7 minutes, 3.92 seconds, about 14 seconds faster than the previous Turbo S. That racetrack, nicknamed the "Green Hell," is considered one of the toughest tests of a car's endurance and handling.
Despite the added weight of the hybrid system, Porsche said the car is more agile and has improved cornering grip. The electric-assisted turbochargers help eliminate the lag drivers sometimes feel when waiting for a gas engine to respond, producing quicker throttle reaction.
The tech-focused online publication Ars Technica heralded the "insanely clever" hybrid engine design, which it said results in a "remarkable" throttle response more akin to an electric vehicle with no perceptible lag when the driver's foot is put to the metal.
The model includes active aerodynamics with new cooling flaps and an adjustable diffuser that reduce drag by about 10 percent. These features work like an airplane wing in reverse, pushing the car to the ground for stability while slicing through air more efficiently.
Standard equipment includes Porsche's Dynamic Chassis Control system, which keeps the body flatter through sharp turns, as well as carbon-ceramic brakes and larger rear tires for stronger stopping power and traction.
Design changes feature new wheel options, interior upgrades and distinctive "Turbonite" accents on the Porsche crest and trim. Buyers can customize the car through the company's Porsche Exclusive Manufaktur program, which offers lightweight carbon parts, special paint finishes and even a matching wristwatch.
The vehicle will start at about $318,000, with deliveries in Europe expected to begin later this year, the company said.
The debut highlights how hybrid systems are no longer limited to improving fuel economy. Porsche is using electricity to make its fastest car even faster and more responsive, signaling how the push toward electrification is reshaping the performance car industry, a shift already underway at rivals like Ferrari and Lamborghini.
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