Electric cars from Audi, Porsche: Explaining platform magic

Audi e-tron GT Concept, 2018 LA Auto ShowIt would be unthinkable for any automaker but Porsche to introduce a new car with a flat-6 engine hung out behind the rear axle. At this week’s 2018 LA Auto Show, the 2020 Porsche 911 duly made its debut in the hallowed configuration that has persisted since 1964. But with underpinnings specific only to one model, the new 911 is a major...