Aston Martin Valhalla supercar tests hard at the ‘Ring

A prototype for Aston Martin’s upcoming Valhalla has been spotted at Germany’s Nürburgring racetrack, in what is likely to be some of the final testing for the plug-in hybrid supercar. The Valhalla is due out later this year as the new flagship of the Aston Martin lineup. The car is meant to fill the void left by the Valkyrie, though the…