For MotorTrend's latest "Head 2 Head" episode, Jonny Lieberman pits two of Germany's finest sports sedans - the BMW
M5 and the Porsche Panamera
GTS - against each other. Although the horsepower figures might match the 553hp M5 against the top-of-the-line, 543hp Panamera Turbo S, that model carries a significantly higher price tag. So Porsche
in this comparison had to be represented by its newer (but less powerful) addition, the 430hp Panamera GTS.