@911FAN: I based my conclusion with this spot, by looking at other recent 'spyspots' of Aston Martins on Autogespot (https://www.autogespot.com/aston-martin-dbs-superleggera-volante/2018/05/19), and it seems as though it's entirely possible that they are using DB11 parts in the testing vehicles of the DBS Superleggera Volante (Both cars are based on one another). You mention that this car has a 5200cc V12 engine...it's been confirmed by numerous sources that the DBS Superleggera uses that engine too (from the DB11). Also, the DB11 AMR only comes with one exhaust at either side, and if you look closely, this car actually has twin exhausts either side.
That is a DB11, possibly a DB11 AMR Volante prototype. The DBS superleggera has a different rear design, also the side vents are a different design. A quick registration check shows it to have the 5200cc V12 whereas current DB11 Volante's are V8 only.
Join our weekly update alert so you never miss out on pictures of the finest, most expensive, fastest, and most exciting exotic cars. You'll get alerted to...