Audi A2

• High-tech chassis
• Shorter than an A1
• Electric powertrain

The Audi A2 concept is one of the surprises of the Frankfurt show. Audi describes it as a technical study that offers a peek into the future of electric motobility, but the car also previews a new model line for the brand.

At 3.8 metres long, the A2 concept is 15cm shorter than an A1. Its a fraction narrower, too, but 7cm taller. Audi says that clever packaging means that as with the orignal A2 - theres still plenty of space for four people.

The A2 concepts styling also hints at the original A2, although the rear end resembles the A1 Sportback concept cars. The Frankfurt show car has a glass roof that switches from dark to transparent at the push of a button.

The headlights use the latest LED matrix beam technology, using a combination of LEDs and microreflectors. The rear lights adapt their strength to the current lighting conditions, while the rear foglight uses laser diodes.

A dynamic light runs below the edge of the window line it acts as a continuous side marker when the indicator is activated. A red bar of light flows forward from the rear lights when braking.

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The interior has a dynamic light that arches across the dash, as well as control surfaces that fold up when the vehicle is started.

The A2 concept has an all-electric powertrain and its chassis uses a mix of aluminium and carbon fibre reinforced plastic (CFRP) to keep weight down. It's not related to either the A1, or the VW Up.

Audi also confirmed that the A1 Sportback is due in early 2012. The all-new A3 will be on sale by mid-2012.