Which German uber-saloon is fastest: The BMW M5, Mercedes-AMG E63S or rather complicatedly-named Porsche Panamera Turbo S E-Hybrid? Subscribe now: All have V8 engines with two turbochargers attached, and all are big executive cars, and all have four-wheel drive, but beyond that they go about things in slightly different ways, as we'll explain. But only one can be quickest through 60mph, 100mph, a standing 1/4 mile and a standing 1/2 mile. Question is, which one? Matt
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