The high-performance Porsche Panamera GTS is being reviewed while driven on some winding mountain roads in Spain. Porsche’s Panamera GTS is powered by a 4.8-litre naturally aspirated V8 engine, which sends 430 hp and 520 Nm of torque with the help of the trick PDK double-clutch 7-speed transmission. With a top speed of 179mph (288 km/h), the Panamera GTS is able to rocket its massive body from 0 to 62 mph (100 km/h) in just 4.5 seconds.