The brand's flagship sedan, the A8, has been redesigned for 2019 and adds sophistication with a high-tech, semi-autonomous driving system. Now offered in a single, long-wheelbase format, the new A8 is more spacious and serves up a cabin with a vast selection of wood accents and metallic trim. Under the hood, there’s a 335-horsepower, turbo V6 with a mild hybrid system, while a twin-turbo V8 with about 460 horsepower will eventually be added as well.