Autocar pits Mercedes-Benz A45 AMG against CLA45 AMG - video screencap

Having already driven the new Mercedes-Benz CLA45 AMG, we're just itching to get our hands on its hatchback counterpart, the A45 AMG. Not only has Auto Express driven both cars, it recently pitted them against each other in a head-to-head sibling rivalry throwdown.

On both the open track and the open road, AE gets a feel for both performance compacts including the pair's pièce de résistance, the incredibly compact and powerful 2.0-liter, 355-horsepower turbo four-cylinder engine. We don't want to ruin any of the fun for you, so scroll down to find out what AE has to say about these new AMG cars.