Riding on the same platform as the Chevrolet Impala and Buick LaCrosse, the front- and all-wheel-drive XTS provides a level of interior space you won't find on some of the Cadillac's competition. And our Platinum-trimmed tester impressed us with rich interior materials nearly everywhere—well beyond those platform-mates and easily the match of top-tier competition. The V-Sport model elevates performance with its combination of all-wheel drive and a twin-turbo 3.6-liter V-6 making 410 hp and 369 l