At the special request of a European customer, Audi has created the A8 L extended, a built-to-order six-seater limousine model measuring 6,360mm in length and with a wheelbase of 4,220mm, 1,090mm longer than the Audi A8. 

The Audi A8 L extended benefits from the low weight of the production model's body, which uses an Audi Space Frame design and is made almost entirely from aluminium. For the built-to-order version, the engineers extended the side sills and centre tunnel using extruded aluminium sections. Inside the tunnel, these also assist with the air routing. A double rear bulkhead separates the passenger compartment from the luggage compartment while the roof incorporates additional aluminium profiled tubes and cross-braces. These measures provide torsional and flexural rigidity almost on a par with the A8 L.

All passengers face the direction of travel in the Audi A8 L extended. The six seats are upholstered in extra-supple Valcona leather, in the colour velvet beige. Rows two and three feature electrically adjustable individual seats. The third row has a continuous centre console, a Rear Seat Entertainment display and a cool box.

The one-off A8 version is powered by a 3.0-litre TFSI engine developing 310bhp, delivering 440Nm of torque. This propels the saloon from 0-100km/h in 7.1 seconds and up to an electronically governed top speed of 249km/h. An eight-speed tiptronic transmission transfers engine power to the quattro permanent all-wheel drive system.