• Somehow, The McLaren 765LT Is More of a Sleeper Than You Think

Should we now start calling it the McLaren 885LT?

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The McLaren 765LT might be more powerful than McLaren’s letting on. YouTube channel DragTimes hooked a 765LT up to a dyno to see how much power the supercar produced at the wheels. The 765LT was subjected to three runs, and all three runs came back with power figures that were well beyond what we thought and what McLaren announced. The dyno tests don’t change the fact that the 765LT is an absolute monster, but it’s apparently a bigger and meaner monster than we expected.

The McLaren 765LT is powered by a twin-turbocharged 4.0-liter V-8 engine that produces 755 horsepower and 590 pound-feet of torque. Those are the figures that McLaren claims the V-8 produces. The British automaker, though, has a history of understating the engine output of its model so it wouldn’t come as a shock if the story reads the same with the 765LT.

DragTimes strapped the supercar to a dyno to see how much power it could produce through the rear wheels.

In the first run, the 765LT produced 765 horsepower and 596 pound-feet of torque. On the second run, the supercar managed to hit 770 horsepower and 596 pound-feet of torque, and on the third and final run, it peaked at 757 horsepower and 607 pound-feet of torque.
Somehow, The McLaren 765LT Is More of a Sleeper Than You Think
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The results reflect McLaren’s output claim, but there is a stark difference between the two. The output from dyno tests shows what’s produced through the wheels, not from the engine. Depending on the powertrain setup of a specific car, there typically is a loss in output of around 10 to 20 percent from the engine to the wheels. DragTimes claims a 13 percent drivetrain loss in the 765LT from a video of a different dyno run, so assuming that’s the case, the 765LT’s twin-turbo V-8 engine could be producing as much as 885 horsepower. That’s a whopping 130 horsepower more than McLaren’s claimed output.

To put that in perspective, a McLaren 720S was tested on the same dyno and hit 659 horsepower at the wheels during its fastest run. Assuming a loss of output of 13 percent and the 720S’s 4.0-liter twin-turbocharged V-8 engine actually produces in the neighborhood of 745 horsepower. That’s around 35 horsepower higher than McLaren’s claimed output of 710 horsepower.

Somehow, The McLaren 765LT Is More of a Sleeper Than You Think
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Heck, the automaker even admitted that the 765LT is actually faster going from 0 to 124 mph than it initially estimated. McLaren initially claimed that the 765LT could hit 124 mph from a standstill position in 7.2 seconds, only to revise that number when the supercar actually got to that speed in seven seconds flat.

Kirby Garlitos
Kirby Garlitos
Automotive Aftermarket Expert - kirby@topspeed.com
Kirby’s first exposure into the world of automobiles happened when he caught Knight Rider on television as a five-year old boy. David Hasselhoff didn’t leave much of an impression on him (that happened later on in Baywatch), but KITT certainly did. To this day, Kirby remains convinced that he will one day own a car with the same ‘spirit’ as the original KITT (not the 2008 monstrosity). He doesn't know when that will be, but until then, he’s committed to expressing his love for KITT, and all cars for that matter, here at TopSpeed.  Read full bio
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