Hot Starting McLaren 720S Makes Awesome Exhaust Sound – Video

 

A development of the 3.8-liter twin-turbo V8 in the 650S, the 4.0-liter mill boasts a lengthened stroke and more than 40 percent all-new components. In this application, the eight-cylinder bruiser develops 720 PS (710 horsepower) and a heady 770 Nm (568 pound-feet) at 5,500 rpm.

It sounds magnificent even at start up, when the force-fed engine burbles gently into life, subsequently settles down at idle, purring like a kitty. But here’s the thing: Did you know there’s a “hot start” mode the McLaren boys have been keeping hush-hush all this time?