Hyundai has unveiled its Ioniq 3, a fully electric compact hatchback for urban driving designed to be as aerodynamically efficient as possible yet still offer up a surprisingly spacious interior—a trick the carmaker is loftily calling Aero Hatch. The 3 is intended to fill the gap between Hyundai's Inster supermini and Ioniq 5 crossover. In profile, the Ioniq 3 has a sleek front end that transitions into a roofline that stays straight over both front and rear occupants before dropping to merge with the rear spoiler. It's this roofline that maximizes interior headroom for the rear passengers, but it also offers a supposed class-leading drag coefficient of 0.263. The Ioniq 3’s impressive aerodynamics will supposedly help it get more than 300 miles on a single charge. Photograph: Courtesy of Hyundai The car has the same underpinnings as its sibling brand, Kia's EV2 .…