New McLaren Senna is extreme 789bhp track-focused hypercar

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McLaren has pulled the covers off the second Ultimate Series model; a lightweight, track-focused hypercar called the Senna. With extreme, aero-optimised bodywork, a stripped-back cabin and a 789bhp twin-turbo V8, it’s said to give “the most intense circuit experience of any road McLaren”.

Named after three-time Formula 1 World Champion Ayrton Senna, McLaren says a portion of the car’s profits will go to the foundation set up in his name. All 500 examples have already been sold at a price of £750,000, including taxes.

The Senna isn’t a direct replacement for the McLaren P1, but will sit alongside the forthcoming three-seat BP23 in the Ultimate Series range.

a close up of a car: McLaren Senna - rear

Vehicle Line Director Andy Palmer says that the brief given to engineers was to “make it as fast as we possibly can going around a track, but also make it road legal”. Palmer also describes it as the “lightest, fastest, most engaging McLaren yet”.

The body is made entirely of carbon-fibre and has been designed for an optimal blend of aerodynamic efficiency and downforce. Crafted in a ‘teardrop’ shape, it features huge gulleys and louvres in the side to channel air down and over the car, plus a number of cooling vents to feed the car’s multiple radiators. The Senna also gets two-piece glass windows, and a glass insert for the lower half of the dihedral doors can be specified to increase on-track visibility.

At the back, three exhausts sit up high and flush with the bodywork, while an enormous carbon rear wing is mounted on ‘pylons’, which rise above it and attach to the top, increasing the surface area on the bottom of the wing. Much of the car’s mechanical elements are visible from the back thanks to a giant double diffuser, which can increase in height to boost downforce.

Inside, the Senna is as minimalist as a modern McLaren gets. Items such as the door handles, window switches and engine start button have been placed on the roof, while the pared-back dashboard design features only the essentials. There are two double-layer carbon bucket seats with foam padding, which slide back and forth with the gear selector panel for better ergonomics.

Despite the clutter-free approach, McLaren’s infotainment system is mounted on a freestanding panel, and the sliding digital instrument cluster is lifted straight from the 720S. The only luggage area to speak of is a space behind the driver’s head specifically designed for two helmets.

McLaren Senna - dash

Weighing just 1,198kg (about the same as a Ford Focus), the Senna has a power-to-weight ratio of 658bhp/tonne. That’s better than a P1, and partly due to a new type of super-light carbon tech that the Woking-based carmaker has developed. It means the dihedral doorframe weighs just 8.8kg, and the carbon tub is 15kg lighter than the P1 at 75kg.

The 4.0-litre twin-turbo V8 is mated to a seven-speed dual-clutch transmission, producing 789bhp and 800Nm of torque. That makes it the most powerful road-legal McLaren engine ever built.

Palmer told Auto Express that hybridisation – like the P1’s powertrain – was considered, but discounted, as it didn’t sufficiently benefit lap times. The Senna has also been designed to deliver an even more sensory experience than previous McLarens, with sounds from the air intakes and engine mechanically amplified for those inside.

Performance figures and, potentially, lap-time data will be released at a later date. The latter is more important for the Senna, according to McLaren, but we can expect a 0-62mph time of less than three seconds and a top speed of at least 200mph regardless.

McLaren claims the Senna’s braking system is the most advanced it has ever made for the road. New carbon ceramic brakes with a special ‘CCMR’ compound feature, and each takes seven months to produce. They have a far greater thermal efficiency than traditional carbon ceramics, however. Bespoke Pirelli P-Zero Trofeo tyres are standard, with a tread that is road legal but primarily designed for track use.

Although all examples have been allocated to buyers, the first public debut of the Senna will be at next year’s Geneva Motor Show in March. – mscn cars