Why is there a bulge in the rear of Volkswagen cars?

[DelSteven]

Volkswagen cars have a bulge in the rear for the sake of chassis flatness. Since the chassis under the car is equipped with an exhaust pipe or drive shaft, rear-wheel-drive vehicles typically need to transmit the engine's power to the rear wheels through the drive shaft, which structurally necessitates such a bulge. Volkswagen AG is an automobile manufacturing company headquartered in Wolfsburg, Germany, with brands such as Audi and Volkswagen under its umbrella. Taking the Tiguan as an example, it is a car produced by Shanghai Volkswagen. In terms of body dimensions, the car measures 4506mm in length, 1809mm in width, and 1685mm in height, with a wheelbase of 2684mm. In terms of appearance, the Tiguan adopts Volkswagen's family design philosophy, with its appealing "teardrop" headlights that not only look stylish and dynamic but also represent a breakthrough in design, making Volkswagen cars appear less "common".