The second-generation Audi A8 was built on the Volkswagen Group D3 platform. The model was longer than the previous generation, with room for four or five large adult occupants in the cabin, depending on rear seat configuration.
As with the previous version, two body variants of the second generation A8 are offered, the A8 (standard, or short wheelbase), and the long-wheelbase (LWB) A8L. The A8L adds 120 mm (4.7 inches) to the rear legroom and 11 mm (0.43 in) to the overall height of the car.
Source: Wikipedia, 2011