Solido 1:43 2020 McLaren 765LT V8-Biturbo, Lime Green

Unveiled on 3 March 2020, the 765LT is a limited (765 units worldwide) version of the 720S and the successor to the 675LT as a Super Series Longtail car, focused on track performance. The M840T engine is now rated at 765 PS (563 kW; 755 hp) at 7,500 rpm and 590 lb⋅ft (800 N⋅m) of torque at 5,500 rpm achieved with a higher-capacity fuel pump, forged aluminium pistons and a three-layer head gasket from the Senna.

The top speed is lowered from the 720S's 341 km/h (212 mph) to 330 km/h (205 mph) due to added drag created by the added high downforce parts, although the 765LT weighs 80 kg (176 lb) less than the 720S at 1,339 kg (2,952 lb) in its lightest configuration and has a quicker 0–100 km/h (0–62 mph) time of 2.8 seconds. It also can hit 0–200 km/h (0–124 mph) in 7.0 seconds and complete a quarter-mile dash in 9.9 seconds according to McLaren. A US-spec McLaren 765LT was tested by Road & Track with a quarter-mile time of 11.6 seconds at 131.1 mph (211.0 km/h), which equates to 0–100 km/h in the high-3 range and 0–200 km/h in the mid-10 range. In addition, it stopped at 92 feet from 60-0 mph.

The Senna's brake calipers are also available as an extra-cost option; McLaren claims these have four times the thermal conductivity as conventional carbon ceramics, while Pirelli Trofeo R tyres are standard. Suspension changes involve a 5 mm (0.2 in) reduction in ride height and the use of lightweight main springs with secondary "helper" units as well as an upgraded Proactive Chassis Control system. The aerodynamics are redesigned to produce 25% more downforce than the 720S, featuring front fender vents, a larger front splitter and a longer active wing element at the rear at the cost of less noise insulation, thinner-gauge glass and stiffened engine mounts. The rear of the car also features a quad-exit full titanium exhaust to distinguish it from the 720S. Production was limited to 765 cars globally with customer deliveries in October 2020.