The retro-inspired Hyundai Ioniq 5 hasn't arrived in US dealers yet, but work on the next EV is already well underway. Whereas the Ioniq 5 takes the form of a radically styled electric hatchback, the Ioniq 6 will be a sleek electric sedan that could replace the Sonata.

Testing of the Ioniq 6 has already started as numerous camouflaged prototypes have been spotted on the road. Production of the Ioniq 6 was scheduled to start in March next year, but The Korean Car Blog has learned from inside sources that the electric sedan is being delayed by a few months to improve several aspects.

According to the source, the front and rear bumpers are being redesigned. As a result, the Ioniq 6 will be 0.7 inches longer than the original design. In addition, the Ioniq 6 will be the first Hyundai model with an innovative "lighting grille" developed by Hyundai Mobis, which lights up to indicate the car's status.

For example, the grille will change color if the car is in autonomous mode or charging. Hyundai is also reportedly installing a larger 77.4 kWh battery pack to improve the electric driving range. Initial targets suggested the Ioniq 6 will have a range of around 300 miles. These changes will reportedly delay production of the Ioniq 6 by three months.

Visually, the design of the Ioniq 6 will be inspired by the stunning Prophecy Concept, incorporating a sleek coupe-like roofline. Inside, spy shots of prototypes have shown the interior will have a similar layout as the Ioniq 5, featuring a dual-screen setup for the digital gauge cluster and infotainment system. The Ioniq 6 is expected to be offered with either a single- or a dual-motor setup. In the Ioniq 5, the dual-motor setup produces a combined 301 horsepower and 446 lb-ft of torque.

After the Ioniq 6 launches next year, it will be followed by the Ioniq 7 electric SUV.