Speedtail

McLaren developed the Speedtail under the BP23 programme as a high-speed Hyper-GT rather than a circuit-focused successor to the Senna. Its three-seat cabin placed the driver centrally, consciously revisiting one of the F1’s most recognisable ideas while using a different carbon structure, hybrid powertrain and aerodynamic philosophy. Development prototypes and individually themed MSO executions are excluded from the standard production identity.

The current labelled McLaren specification gives a combined 1,070 PS, 787 kW and 1,150 Nm from a 4.0-litre twin-turbo V8 with parallel electric assistance. A seven-speed dual-clutch transmission drives the rear wheels. McLaren claims 403 km/h, making controlled airflow and power delivery central to the design. The hybrid system is not an incidental efficiency device: electric torque supplements the combustion engine and changes transient response, so a Speedtail recording should identify battery state, operating mode and the point at which the V8 becomes dominant.

The long body, enclosed front-wheel surfaces, retractable cameras and flexible rear ailerons pursue low drag rather than the large downforce devices of the Senna. That choice affects the car’s sound environment. At lower speed, hybrid operation, turbocharger response and cabin isolation may separate events that merge during full acceleration. At very high speed, airflow would dominate, but public-road recordings must never attempt to reproduce the maximum-speed programme. Safe closed-course context and precise microphone placement are mandatory for any performance submission.

McLaren material is not internally consistent across every surviving web section. Some prose describes 1,050 PS and 1,430 kg, while the current labelled technical table shows 1,070 PS and 1,499 kg dry, with a higher DIN figure. Independent publications also mix launch-stage and later specifications. RevAtlas uses the current labelled output and torque while avoiding a mass fact in the main passport until convention and final production specification are reconciled. The discrepancy remains an editorial note, not something to average away.

Only 106 customer slots were announced and allocated, but allocation is not identical to a post-production audit. The archive records 106 as planned production. In lineage, Speedtail belongs beside the F1 because of the central driving position and three-seat layout, yet their powertrains are fundamentally different. It also contrasts with Senna and Elva inside the Ultimate Series. Its archival value lies in documenting how combustion sound, turbocharger behaviour, electrical assistance and a highly insulated aerodynamic body combine in a modern high-speed grand tourer.

BP23 development prototypes, validation cars, themed MSO one-offs and the unrelated McLaren F1 are excluded. Similar names can cover different engines, transmissions, body styles and production programmes. Keeping those distinctions visible protects the technical record and prevents search traffic from turning a familiar badge into a blended specification that no single production car carried.

It works through a 7-speed dual-clutch transmission with rear-wheel drive. Output units remain explicit because manufacturer and independent sources may use bhp, PS or regional horsepower conventions.

For sound documentation, the primary listening markers are hybrid-assisted twin-turbo V8, electric torque fill, seven-speed dual-clutch shifts, high-speed airflow. A cold start must include the uninterrupted crank, first combustion and settling idle, with ambient temperature and vehicle state recorded. Acceleration and fly-by submissions need gear, load, road or closed-course context, microphone position and wind conditions. No recording should be described as factory stock until intake, forced-induction hardware, catalysts, gearbox and silencers have been evidenced.

Period photographs and badges can establish visual context, but they cannot prove mechanical originality. Restoration, service replacement and reversible modification are common across valuable performance cars. RevAtlas therefore records configuration component by component and keeps modified survivors useful without presenting them as untouched references.