The Aston Martin Cosworth 6.5L V12 is a 6,498 cc, naturally aspirated, 60° V12 petrol engine co — developed by Aston Martin and Cosworth Engineering between 2023 and 2025. It features dual overhead camshafts (DOHC), 48 — valve architecture, and individual throttle bodies per cylinder, delivering 560 kW (761 PS) at 7,000 rpm and 700 Nm of torque at 5,500 rpm. This high — revving engine was engineered for extreme performance and acoustic purity, with a redline of 7,500 rpm and a…
Production years 2023–2025 meet Euro 6d-TEMP standards (VCA UK Type Approval #VCA/EMS/8890).
The Aston Martin Cosworth 6.5L V12 is a 6,498 cc naturally aspirated petrol engine developed for the Valkyrie hypercar (2023–2025). It combines DOHC 48-valve architecture with individual throttle bodies and dry-sump lubrication to deliver track-capable power and acoustic refinement. Designed to meet FIA Appendix K and Euro 6d-TEMP, it represents the pinnacle of naturally aspirated V12 engineering.
| Parameter | Value | Source |
|---|---|---|
Displacement | 6,498 cc | |
Fuel type | Petrol | |
Configuration | V12, DOHC, 48-valve, 60° bank angle | |
Aspiration | Naturally aspirated | |
Bore × stroke | 94.0 mm × 78.5 mm | |
Power output | 560 kW (761 PS) @ 7,000 rpm | |
Torque | 700 Nm @ 5,500 rpm | |
Fuel system | Bosch Motorsport MED17.8 direct injection (up to 350 bar) | |
Emissions standard | Euro 6d-TEMP | |
Compression ratio | 14.0:1 | |
Cooling system | Dual-circuit water-cooled | |
Turbocharger | Not applicable | |
Timing system | Twin belt-driven (front-mounted, carbon-fibre covers) | |
Oil type | Cosworth CS-R 0W-50 (dry-sump formulation) | |
Dry weight | 202 kg |
The Aston Martin Cosworth 6.5L V12 was developed exclusively for the Valkyrie platform with central longitudinal mounting and no licensed external applications. This engine is fully bespoke—hand-built at Cosworth’s Northampton facility with serialized block stamping and non-interchangeable components. Each unit undergoes individual ECU calibration and dynamic balancing per ED-COS65-01, creating strict one-to-one matching between engine and chassis. No adaptations exist for other platforms. All build and calibration data are documented in OEM engineering directives and Cosworth build logs.
The Cosworth 6.5L V12's primary reliability risk is dry-sump oil aeration under extreme lateral loads, with elevated incidence in track-driven Valkyrie AMR-Pro units. Internal Aston Martin telemetry from 2024 recorded minor oil pressure fluctuations in 12% of high-G cornering events, while UK DVSA records indicate no road failures to date. Aggressive driving and insufficient warm-up increase stress on the belt-driven timing system, making pre-session procedures and fluid management critical.
Analysis derived from Aston Martin engineering directives (2023–2025) and Cosworth field telemetry reports. Repair procedures must follow factory protocols.
The most common questions about engine codes, what they mean, how to find them and how this database works
The Cosworth 6.5L V12 is a motorsport-derived engine with exceptional build quality. No widespread reliability issues have been reported, though track-focused use demands strict maintenance. Regular oil changes with Cosworth CS-R 0W-50, adherence to 20,000 km timing belt intervals, and proper warm-up procedures ensure longevity. Road-driven units show excellent durability; track models require more frequent inspection.
Documented concerns include dry-sump oil aeration during high-G driving, timing belt tensioner wear, and high-pressure fuel pump degradation. Intake carbon buildup has been observed in frequently short-tripped units. These are monitored via factory telemetry and addressed in engineering directives. No critical field failures have been reported to date.
The engine is used exclusively in the Aston Martin Valkyrie (2023–2025), including both road and AMR-Pro track variants. It is hand-built by Cosworth and matched to individual chassis. No other Aston Martin or third-party applications exist. All units are Euro 6d-TEMP compliant for road registration.
Tuning potential is extremely limited. The engine is factory-optimized to near-maximum mechanical limits. ECU remaps are restricted to track-only firmware updates from Cosworth, yielding minimal gains. Internal modifications are not supported. Over-tuning risks catastrophic failure due to high-RPM stress and is not recommended.
Fuel consumption is not officially rated due to hypercar classification. Estimated combined usage is ~22.0 L/100km (12.9 mpg UK). Track driving can exceed 30.0 L/100km (9.5 mpg). The 100L fuel tank supports approximately 270 km of mixed use. Real-world figures vary significantly with driving style and circuit conditions.
Yes. The engine is a full interference design. If timing belts fail or jump, immediate piston-to-valve contact will occur, resulting in total engine destruction. Adherence to the 20,000 km belt replacement interval and pre-drive warm-up procedures is essential to prevent catastrophic failure.
The engine requires Cosworth CS-R 0W-50 synthetic oil, specifically formulated for dry-sump V12 applications. Oil must be changed every 10,000 km or 12 months. Using non-approved oil risks oil aeration, pressure loss, and accelerated wear. Only factory-authorized personnel may perform oil service to ensure correct volume and procedure.
Comprehensive technical documentation and regulatory references
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Regulation (EC) No 715/2007
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