According to a report from British auto magazine Autocar, Audi is currently developing a new flagship luxury four-door coupe that's based on the A8. Most likely to be called the A9, it would rival the Porsche Panamera and the Mercedes CLS. The addition of an A9 isn't surprising, considering Audi already has both the A5 Sportback and A7 four door luxury coupes already on the market. However, this project has not officially been given the green light for production.
In trying to make a business case for the car, Audi is reportedly looking into platform sharing with fellow VW Group brand Lamborghini. Coincidently, Lamborghini is exploring the possibility of bring the Estoque four door supercar to market. If the models share platforms structures, then they would come with an aluminum space-frame and use main components of the firm's 'Modular Longitudinal Architecture.' The A9 would likely be powered by a newly developed 4.0-liter V8 and could even be offered with the 6.3-liter W12.
The Lamborghini would use the Gallardo's 5.2-liter V10. No word has been given regarding a potential concept version or a possible on sale date. Photos courtesy of Daniel Garcia's Audi A9 Concept.