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McLaren Speedtail – real-world testing commences for fastest ever McLaren

After the launch, McLaren’s arduous testing regime begins for 250mph model

McLaren’s spectacular 250mph Speedtail has moved into its next stage of development, kicking off a year-long phase before production begins in late 2019. We have already been suitably impressed by the Speedtail’s incredible numbers and dramatic design, but McLaren says it’ll take this process of both private test facility running, as well as public road testing around Europe, North America and Africa to ensure buyers won’t be disappointed in their £1.75m (plus taxes) hyper-GT.

The first prototype vehicle to hit the track will also be named in homage to the original facility its forebear, the F1, was designed in nearly 20 years ago, affectionately dubbed ‘Albert’ after the Albert Drive street address in Woking. Despite its familiar nose from the 720S, the prototype is all Speedtail underneath, including the unique central seating position and hybridised 1036bhp powertrain.

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> Click here for our review of the McLaren Senna

The McLaren Speedtail: in detail

Created within McLaren’s Ultimate Series stable the Speedtail joins the Senna and will, before 2025, be accompanied by the replacement for the P1. McLaren calls the Speedtail a Hyper-GT and it will be the fastest McLaren road car the young company has built when the first of the 106 examples are delivered in 2020. Although, you’ll need to scan the classifieds if you fancy one because each one is spoken for.

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The Speedtail’s performance is achieved through two means. The more obvious is its hybrid powertrain that features the 4-litre, twin-turbocharged V8 engine assisted by electric motors driven by a battery pack stored between the passenger cell and the engine. Drive is sent to the rear via McLaren’s seven-speed gearbox and the Speedtail will reach 186mph from a standstill in 12.8sec – 3.7sec quicker than a P1.

Brakes from the Senna and some very trick and bespoke Pirelli tyres for the 21-inch forged aluminium wheels are also part of the package, with the Italian firm working with McLaren on a compound and tyre construction that will provide the compliance and comfort expected of a GT capable of running at 250mph. Talking of maximum speed, Speedtail drivers will need to select Velocity mode to reach v-max.

The second, and essential, contributing factor to the Speedtail’s aim to travel quicker than any McLaren that has gone before is a teardrop design, and McLaren’s design director, Rob Melville, has stretched the boundaries of both McLaren’s design language and the techniques employed to achieve it.

> Click here for our review of the McLaren 600LT 

Not only is the Speedtail’s body manufactured from carbonfibre, it’s also the thinnest carbon – and therefore the lightest – McLaren has worked with and every panel has been sculptured for aerodynamic efficiency. The rear section of bodywork is the largest single-piece carbon panel currently utilised on a road car and at the trailing edge there are a pair of patented ailerons. Hydraulically activated, they are formed from a flexible carbon and adjust to balance the airflow to provide precise levels of downforce and act as an air brake under deceleration. And the front carbon wheel covers? They’re static, fixed through the wheel directly to the hub, and reduce turbulence along the flanks of the car. 

The front splitter, rear diffuser and side skirts are made from Thin-Ply Technology Carbon (TPTC), which comprises layers of carbon just 30-microns thick and positioned at 45 degree angles. The pieces are also infused with titanium which can be coloured prior to being placed within the weave.

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Only four pieces of glass are used in the Speedtail; the windscreen which rolls up to form the roof, a single piece that integrates into the engine cover and the windows in the doors, which are single pieces that also form part of the roof structure and are the reason why McLaren has been able to do away with the door frames and its traditional roof bars.

At over 5 metres long the Speedtail is close to a long-wheelbase S–class in length and has a wheelbase 50mm longer than that of a 720S. The core of the car is a new MonoCell carbon tub that bares little resemblance to that used to underpin regular McLaren models. There’s a lower sill, no doorframes and two of the three seats are also integrated within it. Yes, as per the F1, the Speedtail is a three-seat car with a central driving position.

Talking of interiors, the centrally positioned driver is faced by five screens: the central display is for the core instruments, the two flanking it display the infotainment, satnav, trip computer and everything else a modern car needs to tell you. Above these two outer screens is another pair of smaller screens for the digital mirror system; you did spot that there were no wing mirrors, didn’t you? 

Using technology developed in sportscar racing there are two aerodynamic pods, each fitted with a wide-angle camera. The pods are positioned within the doors and slide out when the car is moving. When the driver selects Velocity mode they retract to reduce drag along the side of the car. Velocity mode also lowers the Speedtail by 35mm on its active suspension system. 

Above the driver is a pod housing the controls for the gearbox and dynamic drive modes, as well as the controls for the powered doors. And just as Kenwood was charged with developing the lightest hi-fi for the F1, so too has Bower & Wilkins for the Speedtail.

‘Customers have been asking us for a new F1 since McLaren Automotive was born eight years ago,’ says Andy Palmer, vehicle line director for Ultimate Series.  ‘The Speedtail is the car they have been waiting for. When we showed it to them in early October the reaction suggested we had delivered what they had been expecting.’

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With development work now under way – with the first two 720S mules, one of which is called Albert in homage to one of the original Ultima-based F1 mules – McLaren has just over 12 months to build its fastest-ever road car.

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