Development of the Aston Martin Valkyrie continues to chug along and earlier this month, a prototype was filmed undergoing tests at the Silverstone circuit over in the UK.

Aston Martin first premiered the Valkyrie prototype in question to the public back in July and shared a video of the car to the world. Unfortunately, that clip didn’t provide us with a very good idea of how the hypercar sounds, something that the latest one rectifies.

The V12 engine comes from Cosworth, displaces 6.5-liters, and will rev all the way to 11,200 rpm in the final production car. It’s likely that the unit found in this prototype doesn’t rev quite that high and is instead being tested at lower rpms. The person behind the wheel also appears to be short-shifting and, according to someone in the video’s comments section, the prototype features a beefy muffler that the road car won’t, meaning this is just a taste of what we can expect.

Head-Turner: Aston Martin Valkyrie Hypercar Dazzles The Crowd At Silverstone

Not only will the Aston Martin Valkyrie sound remarkable, it also has the potential to redefine what we thought was possible for high-performance hypercars. The 6.5-liter V12 alone pumps out 1,000 hp and 545 lb-ft (740 Nm), making it the most powerful naturally-aspirated road car engine on earth. Coupled to this engine will be an electric motor and battery pack developed by Rimac and Integral Powertrain that adds another 160 hp and 207 lb-ft (280 Nm) of torque.

“Aston Martin Valkyrie continues to redefine what you and I recognize as a hypercar, possessing unrivaled levels of performance in a package that is technologically beyond anything else,” Aston Martin Lagonda president and group chief executive Andy Palmer said earlier this year.