The McLaren is powered by a BMW 6.1 Liter V12 engine producing 627 hp with a 0-60 mph time of 3.1 seconds and a top speed of 230-240 mph.

The 16/4 Has a slightly higher top end of approx 253 MPH..
I'd still take the Mclaren.

Here's a car that's faster on the top end:
In 1970, Gary Gabolich's rocket car, "Blue Flame", attained a spectacular 622.4 miles per hour..
Taken from: Bonneville Saltflats You never said the car had to be street legal..