2010 Audi Quattro Concept
In 2010, the Audi Quattro Concept dropped at the Paris Motor Show and went on to be one of the talking points of that exhibition. Meant to be a commemoration of the 30th anniversary of the Audi Quattro, it was a lightweight, short wheel-base version of the RS5. It had 402 hp and a 6-speed manual transmission, so it promised to revive the original Quattro Coupe. Sadly, the project just got shelved.
2006 Saab Aero-X
Saab is best known for its futuristic and wild concept cars. The company took the Aero-X to the 2006 Salon International de l’Auto. It ran on a twin-turbo V6 engine that ran on pure ethanol and an all-wheel drive. The Aero-X seemed like it was going to have solid performance. People loved how the canopy opens up and out. This car was slated to make an appearance in Transformers as well. Unfortunately, Saab did not have the budget to make the car. None of its other units carried any of its features either.