Hennessey’s 809 WHP McLaren 720S Looks And Sounds Ready For Takeoff

What could anyone possibly do to the McLaren 720S to make it even hotter? Why, if you’re Hennessey, then the obvious answer is injecting it with even more power.

The Texas-based tuner has given it the HPE900 treatment, which consists of upgrading a lot parts in the engine compartment, including the turbocharger and intercoolers, adding high-flow air filters and a stainless steel exhaust, and recalibrating the ECU.

Also See: McLaren 720S Vs 675LT Shows How Much Woking’s Supercars Have Evolved

As a result, the 4.0-liter V8 now pushes out a whopping 809 hp (821 PS / 604 kW) and 627 lb-ft (850 Nm) of torque at the wheels. The official McLaren spec sheet says the stock 720S has 710 hp (720 PS / 530 kW) and 568 lb-ft (770 Nm) of torque at the crank, which allows it to hit 62 mph (100 km/h) in a mere 2.9 seconds and a maximum speed of 212 mph (341 km/h).

From the outside, you can tell the modded 720S by the ‘Hennessey’ and ‘HPE900’ logos. There’s also a serial numbered dash plaque in the cockpit and another one in the engine compartment.

Hennessey is offering all upgrades with a 3-year/36,000-mile (57,936 km) warranty, and the HPE900 kit for the 720S is no exception, giving potential owners who yearn for even more power peace of mind. In the following video you can watch, and hear, Hennessey’s upgraded 720S being tested on the dyno – and this is no half-hearted effort, but a full-on, pedal to the metal run.

 

more photos...
  • Six_Tymes

    OK, this raccoon I like.

  • Carl Sloan

    From the front this looks like an a n u s. Why do all their cars look like c r a p? They’re too tall and narrow and all look alike.

AWD Toyota Prius: A Reliable Companion In All Kinds Of Weather

The exact same positives and negatives as a normal Prius, only with added traction.

Here’s How The 2017 VW Golf Alltrack Stood Up To A 2-Year Long-Term Test

Test drives are all nice and dandy, but a long-term one really simulates the actual experience of owning a car.

Is This 1995 BMW 850 CSi Worth Saving? For $17k, We Think So

The 1995 BMW 850 CSi features the S70B56 engine, limited to just 1510 examples worldwide.

Crocodile Dundee Would Be Proud Of This Tesla Model S Custom Interior

The Tesla Model S features a very modern interior ambiance, this one however not so much.

These Motorhome And RV Frontal Crash Tests Will Bring Shivers Down Your Spine

The crash tests were performed by the Swedish Transport Administration and include multiple motorhome models.

McLaren GT vs. Aston Martin DB11: Which British Grand Tourer Gets Your Vote?

The new McLaren GT is quicker on paper than both the V8 and V12-powered Aston Martin DB11.

“I Eat Ass” Decal Lands Man In Jail, But He Might Get The Last Laugh

Following the arrest, officials decided not to prosecute the case over First Amendment concerns.

2019 Mercedes C-Class Is Still A First-Class Premium Cruiser

If it’s comfort you’re looking for, the revamped C-Class is still your best choice in the segment.

Volkswagen T-Cross Manages To Make A Very Good Case For Itself

The T-Cross can be flashy if that’s what the buyer wants, but it can also look very civilized.

New Suzuki Jimny Is Aimed At 4×4 Enthusiasts, But How Does It Go On Tarmac?

Its USP might be its unique off-roading abilities, yet the new Jimny doesn’t do that bad on tarmac, either.