The McLaren M860 GTR is a 3,994 cc, twin — turbocharged V8 petrol engine, co — developed with Ricardo and produced between 2018 and 2021. It features a flat — plane crankshaft, dry — sump lubrication, and direct fuel injection, delivering outputs exceeding 600 kW (816 PS) in track — focused configurations. The use of a flat — plane crankshaft enables a higher, more aggressive engine note and faster revving character, suited to its motorsport — derived purpose.
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Production years 2018–2021 meet Euro 6 standards for applicable road-legal derivatives .
The McLaren M860 GTR is a 3,994 cc twin-turbocharged V8 engineered for ultimate track performance (2018-2021). It combines a flat-plane crankshaft with dry-sump lubrication and bespoke turbochargers to deliver explosive power delivery and high-revving character. Designed to meet Euro 6 standards for road derivatives, it prioritizes performance above all else.
| Parameter | Value | Source |
|---|---|---|
Displacement | 3,994 cc | |
Fuel type | Petrol | |
Configuration | V8, DOHC, 32-valve, flat-plane crank | |
Aspiration | Twin-turbocharged | |
Bore × stroke | 93.0 mm × 73.6 mm | |
Power output | 600–675 kW (816–918 PS) | |
Torque | 800–900 Nm @ 5,500–7,200 rpm | |
Fuel system | Direct injection (Bosch HDEV6) | |
Emissions standard | Euro 6 (for road-legal derivatives) | |
Compression ratio | 9.4:1 | |
Cooling system | Dual-circuit water-cooled with auxiliary oil coolers | |
Turbocharger | Twin mono-scroll turbochargers (Garrett) | |
Timing system | Chain-driven, dual overhead camshafts | |
Oil type | McLaren MTF-94 (SAE 10W-60) | |
Dry weight | 205 kg |
The McLaren M860 GTR was used exclusively in the McLaren Senna GTR platform with longitudinal mid-engine mounting and is not licensed to other manufacturers. This engine received no platform-specific adaptations as it was bespoke for a single model, and no facelift occurred during its production run. All technical specifications are documented in OEM technical bulletins.
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Field reports and technical service bulletins highlight component wear patterns under high-load operation. Adherence to manufacturer service intervals and approved fluid specifications is critical for long-term reliability.
Analysis derived from manufacturer technical service bulletins and industry workshop records. Repair procedures should follow manufacturer guidelines.
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As a limited-production, track-focused engine, the M860 GTR is robust when maintained meticulously and operated within its design parameters. Its primary 'reliability' concern is thermal management; adhering to cooldown procedures and using the correct fluids is paramount. With proper care by authorized technicians, it can be very reliable for its intended purpose.
The most documented issues relate to its extreme operating environment: turbocharger heat soak damage, high-pressure fuel pump failures, and exhaust manifold stud fatigue. ECU software glitches under track conditions have also been noted. These are addressed in McLaren's specific service bulletins for the Senna GTR.
The M860 GTR engine was used exclusively in the McLaren Senna GTR, a track-only hypercar produced from 2018 to 2021. It is not found in any other McLaren road car or model, including the standard Senna, which uses the M840T engine.
Officially, McLaren does not offer power upgrades for the Senna GTR, as it is already at the limit of its engineering. Unofficial ECU remaps exist but carry significant risk of component failure and void warranties. Any modification should only be undertaken by McLaren Special Operations (MSO) with full understanding of the risks.
Fuel economy is not a design priority. In track use, consumption can exceed 30 L/100km. For the few road-legal variants, combined figures are approximately 15-20 L/100km (15-11 mpg UK), heavily dependent on driving style. It requires high-octane (RON 98+) fuel for optimal performance and safety.
Yes. Like virtually all modern high-performance engines, the M860 GTR is an interference design. A timing chain failure would result in catastrophic damage as the pistons would collide with the open valves. Regular inspection of the timing system is part of the scheduled service.
McLaren mandates the use of its bespoke MTF-94 specification oil, which is a 10W-60 synthetic. This oil is specifically formulated for the extreme temperatures and loads experienced by the M860 GTR. Using any other oil can lead to accelerated wear and potential engine failure.
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