Behind the 2018 Porsche Panamera 4 E-Hybrid, the newest addition to Porsche’s luxury sport sedan lineup. A plug-in hybrid, the Panamera 4 E-Hybrid’s powertrain consists of a 326 hp, 2.9-liter, twin-turbo V-6, and a compact 134 hp electric motor mounted between the internal combustion engine and the eight-speed PDK dual-clutch transmission. Total system output is 456 hp, with a solid 516 lb-ft of torque on tap from just 1,100 rpm. Porsche claims the Panamera 4 E-Hybrid will accelerate to 60 mph in just 4.4 seconds, and hit 172 mph.