TOYOTA has unveiled the world's smallest four-seat passenger concept car.

At 2,980mm long, the Toyota iQ is 425mm shorter than the Aygo, but comparable to the Yaris in width and height (1,680mm x 1,480mm).

It has seating for three adults plus a child, with the option of using the fourth seat for luggage space.

In regular use, driver and passenger sit side by side, but by sliding the passenger seat further forwards, there is room for an extra adult and child in the rear.

Space-saving design and miniaturised technology help free up interior space.

A good example of this is the compact heating unit, which takes up less room in the centre console.

A single central dial displays the interior temperature and ventilation controls, directly in the driver's eyeline, with a three-dimensional three-in-one speed, rpm and fuel level read-out mounted above the steering column.

Audio and navigation controls are integrated into the steering wheel, with the route-finding information projected in a head-up display while a panoramic glass sunroof adds to the light and open feel. Viewed in profile, the ultra-short overhangs and cab-forward silhouette create a dynamic look, while ensuring maximum usable space is gained inside.

The structures around the 17in tyres add to the sense of strength and agility.

The iQ concept was created at ED2, Toyota's European design studio in the South of France.