The McLaren Senna is a limited-production mid-engined sports car manufactured by McLaren Automotive. The car is the third addition in the McLaren Ultimate Series, joining the F1 and the P1; however, it is not a direct successor to either of the cars. The Senna was unveiled online by the company on 10 December 2017, with the official unveiling taking place at the 2018 Geneva Motor Show.

The car is named after the Brazilian Formula One race driver Ayrton Senna, honouring and giving tribute to his success with the McLaren Formula One Team between 1988 and 1993 Formula 1 seasons. Senna won three Formula One World Drivers' Championship titles and thirty-five Formula One Grand Prix race wins with the team; McLaren also won four consecutive Formula One World Constructor's Championship titles with Senna as part of their driver line-up.

McLaren Automotive holds the rights to the Senna family name along with the Instituto Ayrton Senna. The organisation and McLaren have made the Senna name exclusive to the car, thereby prohibiting any other company from using the name.

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.

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' 3,994 cc (4.0 L; 243.7 cu in) twin-turbocharged V8 engine codenamed the M840TR. It utilises a seven-speed dual-clutch transmission that delivers all 800 PS (588 kW; 789 hp) at 7,250 rpm and 590 lb⋅ft (800 N⋅m) of torque at 5,500 rpm to the rear wheels. 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 1,198 kg (2,641 lb), which allows for a maximum power-to-weight ratio of 667 PS (491 kW; 658 hp) per ton.

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. 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.

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.

Curb weight:                                         1353-1374 kg (2983-3029 lbs)

Torque:                                                 800 Nm (590 lb-ft)

Transmission:                                       7-speed daul clutch

Layout:                                                  middle engine, rear wheel drive

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