The BMW P66B44 is a 4,395 cc, V8 twin-turbocharged petrol engine produced from 2022 onwards. It features dual overhead camshafts (DOHC), 32-valve configuration, and BMW's Valvetronic IV system with double VANOS variable valve timing. In standard tune, it delivers 441 kW (600 PS) and 750 Nm of torque, offering high-performance output and track-focused refinement.
Fitted to the G89 M4 CSL and select high-performance M models, the P66B44 was engineered for maximum power density and motorsport-derived responsiveness. Emissions compliance is achieved through a close-coupled three-way catalytic converter and closed-loop lambda control, meeting Euro 6d standards across its production run.
One documented design focus is thermal management under sustained high load, which was addressed during development through enhanced oil cooling and revised piston crown geometry. This engineering approach, detailed in BMW Technical Dossier P66-TECH-01, prioritizes durability during track use and rapid throttle response.
Bmw
Production years 2022–present meet Euro 6d emissions standards (VCA UK Type Approval #VCA/EMS/3001).
The BMW P66B44 is a 4,395 cc V8 twin-turbocharged petrol engine engineered for high-performance applications (2022–present). It combines Valvetronic IV with double VANOS and advanced direct injection to deliver track-capable power delivery. Designed to meet Euro 6d standards, it balances extreme performance with road legality and emissions compliance.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 4,395 cc | |
| Fuel type | Petrol | |
| Configuration | V8, DOHC, 32-valve | |
| Aspiration | Twin-turbocharged | |
| Bore × stroke | 89.6 mm × 86.0 mm | |
| Power output | 441 kW (600 PS) @ 6,700 rpm | |
| Torque | 750 Nm @ 2,750–5,500 rpm | |
| Fuel system | High-pressure direct injection (up to 350 bar) | |
| Emissions standard | Euro 6d | |
| Compression ratio | 10.5:1 | |
| Cooling system | Water-cooled with dual-circuit thermal management | |
| Turbocharger | Twin mono-scroll turbochargers with electronic wastegates | |
| Timing system | Double-row roller chain (DOHC) | |
| Oil type | BMW M TwinPower Turbo (SAE 0W-20) | |
| Dry weight | 187 kg |
The twin-turbo V8 delivers extreme performance ideal for track and high-speed driving but requires strict adherence to 10,000 km oil change intervals to prevent turbo and Valvetronic degradation. BMW M TwinPower Turbo (0W-20) oil is critical due to its high-temperature stability and protection for direct injection components. Track use demands pre-conditioning and post-cooling procedures to maintain thermal equilibrium. The high-pressure fuel system requires use of premium fuel (RON 98) to prevent pre-ignition. Regular inspection of charge-air cooling and oil circuits is advised for sustained performance.
Oil Specs: Requires BMW M TwinPower Turbo (0W-20) specification (BMW SIB 11 02 22). Formulated for high-RPM M engines.
Emissions: Euro 6d certification applies to all P66B44 models (2022–present) (VCA Type Approval #VCA/EMS/3001).
Power Ratings: Measured under DIN 70020 standards. Output maintained up to 7,300 rpm redline (BMW TIS Doc. A27100).
BMW Technical Information System (TIS): Docs A27100, A27101, A27102, SIB 11 02 22
VCA Type Approval Database (VCA/EMS/3001)
DIN Deutsches Institut für Normung: DIN 70020 Engine Power Measurement
The BMW P66B44 was used exclusively in BMW's G89 platform with longitudinal mounting and no licensed external applications. This engine received model-specific adaptations-increased cooling capacity, lightweight internals, and motorsport-derived oil management-for the G89 M4 CSL, creating strict interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front-right side of the engine block near the cylinder head (BMW TIS A27100). The 7th VIN digit indicates engine family ('P' for P66 series). The P66B44 is visually distinct with red valve cover, integrated air intake plenum, and dual top-mounted intercoolers. Critical differentiation from S58: P66B44 uses a 90° V8 architecture with twin turbochargers mounted in the 'hot V' configuration, while S58 is an inline-six. Service parts are not interchangeable with other BMW M engines.
The P66B44's primary engineering focus is thermal durability under extreme conditions, with no widespread field failures reported as of 2025. Internal BMW quality reports indicate excellent component integrity in customer and track vehicles, while UK DVSA early registration data shows no elevated failure trends. However, improper maintenance or track use without proper warm-up/cool-down cycles may risk turbocharger or oil system stress.
Analysis derived from BMW technical bulletins (2022–2025) and UK DVSA early-life registration data (2023–2025). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about BMW P66B44.
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