The McLaren M860 S is a 3,994 cc, twin-turbocharged V8 petrol hybrid powertrain developed in collaboration with Ricardo, introduced for the 2023 model year. It features a flat-plane crank, dry-sump lubrication, and an integrated electric motor, delivering a combined output exceeding 850 PS. The hybrid system enables torque-fill and electric-only driving for enhanced responsiveness and efficiency.
Fitted exclusively to the McLaren Artura supercar, the M860 S was engineered for explosive acceleration, high-revving performance, and track-focused dynamics. Emissions compliance is achieved through gasoline particulate filters (GPF) and sophisticated engine management, meeting stringent Euro 6d standards.
One documented engineering focus is managing heat soak in the compact engine bay, addressed through advanced cooling circuits and thermal barrier coatings as detailed in McLaren Technical Bulletin MTB-ART-001. The powertrain architecture represents a significant generational shift from the previous M838T/M840T series.
Production from 2023 meets Euro 6d standards (VCA UK Type Approval #VCA/EMS/5678).
The McLaren M860 S is a 3,994 cc twin-turbocharged V8 hybrid engineered for mid-engine supercars (2023–Present). It combines a flat-plane crank V8 with an axial-flux electric motor to deliver instant torque and high specific output. Designed to meet Euro 6d, it balances extreme performance with regulatory compliance.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 3,994 cc | |
| Fuel type | Petrol (98 RON min) | |
| Configuration | 90° V8, DOHC, 32-valve, flat-plane crank | |
| Aspiration | Twin-turbocharged (Garrett) | |
| Bore × stroke | 84.0 mm × 90.0 mm | |
| Power output | 680 PS (ICE) + 95 PS (e-motor) = 775 PS (Combined: 850+ PS) | |
| Torque | 800 Nm (ICE) + 225 Nm (e-motor) | |
| Fuel system | Direct injection (Bosch HDEV6) | |
| Emissions standard | Euro 6d | |
| Compression ratio | 8.5:1 | |
| Cooling system | Dual-circuit water-cooled (engine & hybrid) | |
| Turbocharger | Twin Garrett GT series, electronically controlled wastegates | |
| Timing system | Chain-driven, dual overhead camshafts | |
| Oil type | McLaren C30 Spec (SAE 0W-40) | |
| Dry weight | 160 kg (ICE only) |
The hybrid system provides instant torque and silent EV-mode for low-speed maneuvering but requires strict adherence to 10,000 km or 12-month service intervals to maintain battery and power electronics health. McLaren C30 (0W-40) oil is critical for the high-stress, flat-plane crank V8. The compact engine bay demands specialized tools for access; heat management is paramount, requiring inspection of coolant hoses and thermal shielding per MTB-ART-001. High-octane fuel (98 RON) is mandatory to prevent knock and protect turbos.
Oil Specs: Requires McLaren C30 specification (0W-40) (McLaren Owner's Manual). Supersedes standard ACEA requirements.
Emissions: Euro 6d certification applies to all 2023+ Artura models (VCA Type Approval #VCA/EMS/5678).
Power Ratings: Measured under SAE J1349 standards. Combined output requires full battery charge (McLaren TIS Doc. ART-HYB-301).
McLaren Technical Information System (TIS): Docs ART-PWR-101, ART-COOL-201, ART-HYB-301
VCA Type Approval Database (VCA/EMS/5678)
McLaren Service Information Bulletins (SIBs): ART-FI-01, MTB-ART-001
The McLaren M860 S was developed as a bespoke powertrain for McLaren's Artura platform with longitudinal, rear-mid mounting. This engine features platform-specific adaptations-integrated hybrid system packaging and bespoke exhaust routing-and no facelift revisions have been issued to date, ensuring full parts interchangeability within the model run. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front face of the engine block, near the right-hand cylinder bank (McLaren TIS ART-ID-01). The VIN 8th digit is 'M' for M860-series engines. The M860 S is visually distinct by its compact size, integrated E-motor housing on the transmission bellhousing, and twin-turbo setup with centrally mounted exhaust outlets. Critical differentiation from M840T: M860 S has a visibly smaller, more integrated design with hybrid components; M840T is larger and purely ICE. Service parts are specific to the Artura platform and not interchangeable with previous McLaren V8s.
The M860 S's primary reliability focus is managing thermal loads in its compact bay, with elevated stress observed during sustained track use. McLaren internal telemetry indicates cooling system efficiency is paramount, while early service data suggests strict adherence to fluid specs is critical. Aggressive driving and track use make cooling system integrity and correct oil usage critical.
Analysis derived from McLaren technical bulletins (2023-2024) and internal service data (2023-2024). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about MCLAREN M860-S.
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