It’s telling that the first presentation on the 2019 Audi A8 mentions horsepower not once, but quotes processing power for the onboard computers multiple times. This car is a technological powerhouse, with more features and driving aids than ever before (in fact, there are so many gadgets I’ve broken some of the coolest ones out in a separate story). Yet the Audi is also designed to be so comfy, quiet, and easy to live with that a discussion of engine specs feels, well, almost like an afterthought. As a result, the new A8 is a superlative luxury machine in every respect. You may want to rant online that the design is evolutionary, but in person the 2019 Audi A8 is clearly all-new. Even on paper, everything has changed: It has grown by 1.5 inches in length, 0.2 inches in wheelbase, and 0.7 inches in height. It now rides upon a version of the Volkswagen Group’s MLBevo modular platform (also used for Bentley Bentayga and Porsche Panamera). Fifty-eight percent of the body is made from aluminum, with the rest made from high-strength steel, magnesium, and carbon fiber. Body rigidity has improved by 24 percent versus the old model. Visually, the A8 is a stunner – if not the most beauti...