McLaren Elva now offered with a windscreen for 2021

McLaren claims the rear-wheel-drive Elva is the lightest road car it has ever produced. Powered by the firm’s 4.0-litre twin-turbocharged V8 engine, it is able to reach 62mph in 2.8secs and has a claimed 0-124mph time of 6.7sec – faster than the track-focused Senna.

The Elva name is taken from the East Sussex constructor whose chassis was used as the basis for McLaren’s M1A, M1B and M1C two-seat sports cars in the 1960s, which serve as spiritual predecessors to the new road car. McLaren has acquired the rights to the Elva name.

McLaren boss Mike Flewitt says the Elva is “a uniquely modern car that delivers the ultimate connection between driver, car and the elements”. It features a bespoke, lightweight carbonfibre chassis, with no roof, windscreen or side windows.

To shield occupants from the elements, McLaren has developed an Active Air Management System (AAMS). Automatically activated at speed, this guides air through a large inlet in the splitter at the front of the Elva’s distinctive low nose and out of a clamshell ahead of the cabin. As a result, the air is channelled up and over the occupants to create a ‘bubble’ of calm. A small carbonfibre deflector rises from the front of the bonnet when the AAMS is active to direct the air, which is deflected through a number of carbonfibre vanes across the bonnet.

When not active at low speeds, the air flow is diverted into two low-temperature radiators to boost their efficiency. McLaren claims the radiators boost the output of the engine by cooling the oil in the seven-speed transmission. The firm says the AAMS tech means helmets are not required but can be worn if preferred, while a fixed windscreen will be offered as a factory option.

As well as the open front, McLaren has made the cabin as open to the elements as possible with low sides and by minimising the size of the twin rear buttresses by the use of an automatically deploying roll-over protection system.

The car has a number of features designed to maximise aerodynamic efficiency, including air intakes on the rear buttresses and an active rear spoiler. The latter works in conjunction with an extreme rear diffuser, which features vertical fences designed to accelerate air out from under the Elva’s flat floor.

McLaren’s traditional V8 engine has been tweaked for improved power output with a revamped exhaust system, while the car’s chassis has been optimised to “maximise agility and driver engagement and feedback”, with electrohydraulic steering and unique software settings and springs.

McLaren has yet to cite a weight for the car, but says that, as well as the open-top design, it has been minimised where possible through the extensive use of carbonfibre. The front clamshell is 1.2mm thick and is formed from a one-piece panel, while the large side panels are also single pieces. The small gullwing doors are carbonfibre too, mounted via a single hinge.

The sintered carbon-ceramic brakes measure 390mm, and McLaren claims they are the most advanced to be fitted to one of its road cars, with increased thermal conductivity that allows for reduced brake duct cooling.

McLaren has used a “blurred boundaries” design principle for the interior, with a carbonfibre element flowing from the rear buttresses into the cabin to serve as the central armrest between the driver and passenger.

The dashboard has been designed for a clean ‘pebble-like’ feel, with the only instrument cluster moving with the steering wheel to ensure optimum visibility.

The Active Dynamics controls are mounted on that instrument cluster for the first time in a McLaren. A central 8.0in touchscreen is used for many of the car’s functions, including a track telemetry system.

The interior features lightweight carbonfibre seats and is offered without an audio system as standard. The floor is exposed carbonfibre, with lightweight non-slip mats as standard. With the cockpit open to the elements, the Elva is offered with a range of trims designed to cope with exposure to rain, sunlight and other intrusions.

A small storage compartment, designed to house helmets, is located beneath the rear tonneau.