A prototype for a high-performance Volkswagen Arteon R has been spotted. The speedy fastback sedan is expected to boast a new turbocharged V-6 with over 400 horsepower on tap. Subscribe for the latest MotorAuthority.com videos: http://bit.ly/XDXWcc Watch More Videos on MotorAuthority.com: http://www.motorauthority.com/videos Follow Us Facebook: https://www.facebook.com/MotorAuthority Twitter: https://twitter.com/motorauthority/ Instagram: https://www.instagram.com/motorauthority/