The Audi A8 L is already a large vehicle. The Audi A8 L Extended is much larger. In development for nearly a year, it's 20.9 feet long with a wheelbase that's 3.6 feet longer than the L, and uses its extra room to make space for two more doors and two more seats. The result is a car that comfortably seats six adults while offering all the luxury and tech touches you'd expect. It's powered by a 3.0 TFSI engine putting out 310 hp, moves from 0-60 in seven seconds, and has Quattro all-wheel drive. All that car takes some serious stopping power, so it borrows the brakes from the sporty S8, and it also has extra tubes and cross braces to help maintain its rigidity. Supposedly a one-off build, the company is already received inquiries into building more — but no word on whether it actually will.