The 720S features McLaren's M840T engine which is an evolution of the M838T used in the 650S. It is a 4.0L twin-turbocharged V8 engine. The engine has a rated power output of 720 PS (530 kW; 710 hp) at 7,500 rpm, giving the car its name; the maximum torque is 568 lb⋅ft (770 N⋅m) at 5,500 rpm.
According to McLaren the 720S can accelerate to 100 km/h (62 mph) in 2.9 seconds, to 200 km/h (124 mph) in 7.8 seconds, and has a 1⁄4 mile (402 m) time of 10.3 seconds.
As you can see in the video, the McLaren 720S easily accelerates to a top speed of 341 km/h, and at one point was able to reach 344 km/h, all on a regular highway.
It's important to note that reaching such high speeds, like 341 km/h or 344 km/h, typically requires driving on a controlled environment like a racetrack or a closed road. Public roads, even under ideal conditions, are not designed for such extreme speeds. The top speed capabilities of the 720S should only be explored in appropriate and legal settings, with due consideration for safety and other road users.
