THANKS TO ITS aluminium Audi Space Frame (ASF), carbon-fibre bonnet and boot lid, Audi has cut nearly 109.8kg from the weight of its A5 Aluminium Prototype.
This brings total weight down to 1309kg compared to the 1420kg of the regular steel-bodied 2.0 litre A5.
Thanks to the significant drop in weight, Audi says the lightened 2.0 litre four-cylinder A5 offers a power-to-weight ratio only 11hp per tonne less than that of the V6-powered model.
Using the 2.0-litre, 155kW Turbo FSI engine, the A5 achieves a power-to-weight ratio of 118kW per tonne.
The 'standard' A5 3.2 FSI V6 quattro with 195kW and tipping the scales at 1540kg, shades it only by a fraction at 127kW per tonne.
While utilised in the R8, new TT and upcoming A8, Audi says it is not planning to introduce the Audi Space Frame into the current generation A5, and has not confirmed that it will be used in a new generation model.
Rumours have been circulating for some time that development of a special Ur-Quattro version of the S5 or upcoming RS5 is underway.
Despite Audi's declaration that the ASF won't be seen in the current generation A5, the Aluminium Prototype does add some credence to the rumours.
[bottom picture: 2009 Audi A5]