[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 1,198 kg (2,641 lb), which allows for a maximum power-to-weight ratio of 498 kW (677 PS; 668 hp) 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.

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.

[9] Behind the two seats is room large enough for two helmets and race suits, reflecting the car's minimalist and track focused design.

The production Senna GTR unveiled two years later has a different bodywork from the concept, with a different wing setup, toned-down aerodynamics, and utilizes a dual-clutch race transmission for faster gear shifts, a revised suspension system and Pirelli racing slicks in order to make it the fastest non-Formula One vehicle McLaren has ever created for faster lap times.

The Senna GTR is estimated to produce at least 825 PS (607 kW; 814 hp) from its 4.0 L twin-turbocharged V8 engine and is meant to be faster and more agile than its road-going counterpart.

[22][23] In reviewing the future regulations for the World Endurance Championship, the Fédération Internationale de l'Automobile (FIA) identified the Senna GTR as one of several models that fit their vision of a replacement for the Le Mans Prototype class.

The Senna LM also features polished ports and cylinder heads, OZ center-lock wheels with a retro design, satin-gold-tipped quad exhausts, louvers on the front fenders, the removal of the clear panel in the doors from the standard Senna, titanium panels and LM branding.

One of these models was destroyed in a road accident in 2020 by former Formula One driver Adrian Sutil, but was later fully repaired.

Only five units have been made, and each has a unique paint scheme reflecting the five McLaren F1 GTRs at the 1995 24 Hours of Le Mans.

[citation needed] The non-hybrid twin-turbocharged 4.0-liter V8 engine is now rated at 824 hp (614 kW; 835 PS) and the car's top speed is 218 mph (351 km/h).