The McLaren 720S has more power but the tuned 600LT has less weight. Place your bets.
The McLaren 720S has proven to be a very formidable supercar. As numerous drag races have shown, the 720S is capable of outrunning significantly more expensive supercars such as the Lamborghini Huracan. We've also seen it make mincemeat out of the Tesla Model S. But what happens when the mighty McLaren 720S is pitted against the 600LT? Normally, the more powerful 720S would destroy a 600LT in a drag race. But this isn't an ordinary McLaren 600LT – it's Hennessey's modified 600LT.
To find out, John Hennessey took his personal McLaren 600LT to the Pennzoil Proving Ground in Uvalde, Texas, to battle it out against a stock 720S in a series of drag races, including a rolling start race at 45 mph and a standing-start battle using launch control.
In stock form, the McLaren 600LT is powered by a 3.8-liter twin-turbo V8 gasoline engine that produces 592 hp and 457 lb-ft, enabling it to hit 0-62 mph in just 2.8 seconds. Thanks to a new exhaust system and retuned ECU software, John Hennessey's modified 600LT makes 658 wheel horsepower.
The McLaren 720S, on the other hand, has a twin-turbocharged 4.0-liter V8 producing 710 hp and 568 lb-ft. After hooking the car up to a dyno, Hennessey discovered the 720S has 675.8 hp at the wheels, so both cars are very comparable in the power department. While the 720S has slightly more power, the 600LT is lighter with a curb weight of 2,994 pounds vs. the 3,139 pounds of the 720S.
Both races are remarkably close, but the 720S has the edge. Still, the fact that a lightly modified 600LT is even in the same league as the 720S is hugely impressive. Of course, Hennessey can extract more power from the 600LT, as the tuner also sells 800-hp and 1,000-hp variants of McLaren's lightweight Sports Series.