Exterior
McLaren's main focus while designing the Senna was to achieve faster lap times. In order to do so, McLaren developed a lightweight design that incorporated aerodynamic elements.[13]
The Senna is largely based on the McLaren 720S, using a modified version of its carbon fibre monocoque and engine. The Senna is powered by a modified version of the McLaren 720S' 3994 cc twin-turbocharged V8 engine codenamed the M840TR. It utilises a seven-speed dual-clutch transmission that delivers all 588 kW at 7,250 rpm and 800 Nm of torque at 5,500 rpm to the rear wheels.[8][14][15] Unlike the previous offering in the Ultimate Series, the McLaren P1, the Senna does not use an electric motor in favour of its low claimed dry weight of 1198 kg, which allows for a maximum power-to-weight ratio of 498 kW per ton.[14]
The car has many aerodynamic elements, there being a large adjustable double-element rear wing (that is operated electronically and has various settings in order to provide optimum performance while also acting as an airbrake), double-element diffuser, Formula One-inspired roof scoop, front and side air intakes, rear air louvres, and large front fenders. Inside the panel beside the intakes is a small set of mini-canards. Areas of low pressure are accompanied using high-performance radiators that ensure improved engine cooling.[16] The car uses dihedral doors, like the previous offerings in the Ultimate Series, and also has optional windows applied on the lower area of its doors.[17]
The Senna uses a new generation of Brembo's carbon ceramic brakes, containing a compound that has three and a half times better thermal conductivity than before, making the brakes smaller and lighter. It also features a new set of lightweight center-lock alloy wheels designed for Pirelli P-Zero Trofeo R tyres. Its central design is a new generation of McLaren's carbon fibre monocoque named MonoCage III, which contributes to the car's relatively low dry weight. The car utilises a top mounted (hot-vee) inconel-titanium exhaust system with three outlet pipes in order for a more aggressive exhaust note and engine emissions.[12][16]
