Lucid expects the Air Electric sedan to have a range of more than 400 miles.

Electric car maker Lucid has begun showing potential customers the production version of the Air sedan, which was first unveiled as a concept in 2016.

Originally planned for 2018, the Air will now go into production later this year at Lucid's Arizona plant. The delay means that the car has changed significantly since it was introduced as a concept.

Lucid has, among other things, evaluated the Air's powertrain and battery packs and improved their efficiency. As a result, the company is confident that the Air can travel more than 400 miles on a single charge, including on highways where there are fewer opportunities for braking energy recovery. By comparison, the range of the latest Tesla Model S is up to 390 miles.

A new video details tests conducted on the Air prototype. The prototype was powered by a 110 kWh battery, but weighed less because the interior was removed.

A Lucid spokesperson told Green Car Report in an interview published Thursday that retesting using newer software and bringing the ballast weight in line with the production Air yielded the same results.

One of the major changes from the original concept was the switch from induction motors to permanent magnet motors. The voltage was also increased from the previous 400 volts.

The higher voltage required less current and generated significantly less heat. With less heat generated, Lucid could reduce the need for cooling, increasing efficiency and ultimately range.

Lucid had planned to launch a production version of the Air in April, but postponed due to the Covid-19 coronavirus pandemic. Despite the setback, the company still intends to begin production on schedule.