The Aston Martin V645 is a 4,499 cc, twin — turbocharged V8 petrol engine developed in — house for the DB12 and Valhalla supercar applications. It features a 90° V configuration, dry — sump lubrication, and direct fuel injection, delivering 540 kW (735 PS) at 6,000 rpm and 900 Nm of torque from 2,750–5,500 rpm. This engine represents a significant evolution of Aston Martin’s modular V8 architecture, incorporating advanced thermal management and hybrid integration for hig…
Production years 2023–present meet Euro 6d-ISC standards (VCA UK Type Approval #VCA/EMS/9415).
The Aston Martin V645 is a 4,499 cc twin-turbo V8 petrol engine (2023–present) developed for high-performance GT and supercar applications. It combines a hot-V turbo layout with direct injection and variable valve timing to deliver high specific output and rapid throttle response. Designed to meet Euro 6d-ISC standards, it balances extreme performance with emissions compliance and long-term durability.
| Parameter | Value | Source |
|---|---|---|
Displacement | 4,499 cc | |
Fuel type | Petrol (Unleaded, 95 RON min) | |
Configuration | 90° V8, DOHC, 32-valve | |
Aspiration | Twin-turbocharged (hot-V layout) | |
Bore × stroke | 89.0 mm × 90.5 mm | |
Power output | 540 kW (735 PS) @ 6,000 rpm | |
Torque | 900 Nm @ 2,750–5,500 rpm | |
Fuel system | Direct injection (Bosch ME17.9.3) | |
Emissions standard | Euro 6d-ISC (WLTP/RDE) | |
Compression ratio | 10.7:1 | |
Cooling system | Triple-circuit liquid cooling with electric pumps | |
Turbocharger | Twin-scroll, low-inertia units (Honeywell) | |
Timing system | Dual-chain (primary and secondary) | |
Oil type | Aston Martin SAE 0W-20 (Specification AMOB-004) | |
Dry weight | 192 kg |
The Aston Martin V645 was used across Aston Martin's DB and Valhalla platforms with longitudinal mounting and is not licensed to other manufacturers. This engine received platform-specific tuning-for increased torque delivery in the Valhalla supercar-and from 2024 integrates revised turbocharger housings per AM-SIB-08-2024, creating interchange limits with pre-2024 variants. All adaptations are documented in OEM technical bulletins.
The V645's primary reliability consideration is thermal management of turbochargers and GPFs under sustained high load, with early data indicating potential for coking in short-trip driving. Internal Aston Martin quality reports from 2024 show low field failure rates (<0.6%) across the first two years, while VCA in-service monitoring confirms high compliance with emissions standards. Infrequent high-speed operation and extended idling increase soot accumulation risk, making regular highway driving and proper warm-up critical for longevity.
Analysis derived from Aston Martin technical bulletins (2023-2025) and UK VCA in-service emissions monitoring (2023-2025). Repair procedures should follow manufacturer guidelines.
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Yes. As a modern in-house V8 (2023–present), the V645 has demonstrated strong reliability in Aston Martin’s internal quality reports, with failure rates below 0.6% over two years. The dual-chain timing and robust turbo design are durable when maintained with correct oil (AMOB-004 0W-20) and service intervals. The 2024 turbo update improved transient response and durability. Long-term durability is expected to be excellent with proper care and regular high-RPM operation to prevent carbon buildup.
The most documented concerns are turbocharger coking from inadequate cooldown, GPF regeneration failures due to short journeys, and hybrid system communication faults in the Valhalla variant. Oil leaks from timing cover seals have also been noted. These are addressed in Aston Martin service information bulletins with specific diagnostic and repair protocols, including the 2024 turbo housing update (AM-SIB-08-2024) to improve boost control.
The V645 is currently fitted to the DB12 (2023–present) and Valhalla (2024–present). It is not used in any other manufacturer's vehicles and is exclusively tuned and calibrated by Aston Martin for GT and supercar applications. The engine is produced at Aston Martin’s dedicated engine facility in Cologne, Germany, and is a key component of the brand’s performance lineup.
Yes, the V645 has significant tuning potential due to its robust internals and twin-turbo setup. Stage 1 ECU remaps typically yield +60–90 kW, while supporting modifications (intake, exhaust, intercooling) enable higher outputs. However, tuning may void warranty and impact emissions compliance. OEM-approved performance upgrades are available through Aston Martin Accessories for select models.
Official WLTP combined consumption is 15.8 L/100 km (~17.8 mpg UK). Real-world figures vary significantly: expect 17–21 L/100 km (~13.4–16.8 mpg UK) in mixed driving, but consumption can exceed 25 L/100 km (~11.3 mpg UK) under hard use. Highway cruising at legal speeds returns approximately 12.5 L/100 km (~22.4 mpg UK). GPF regeneration cycles temporarily increase fuel use.
Yes. The V645 is an interference engine, meaning that if the timing chains fail or jump, the pistons can contact the valves, resulting in severe internal damage. The dual-chain system is designed for the engine's lifespan, but adherence to oil change intervals is critical to prevent chain wear and ensure proper tensioner function. Any timing-related warning should be addressed immediately.
Aston Martin specifies SAE 0W-20 synthetic oil meeting AMOB-004 specification (equivalent to ACEA C5 and API SP). Oil must be changed every 15,000 km or annually. Using correct oil ensures optimal performance of the variable valve timing system, piston cooling jets, and turbocharger bearings. Non-compliant oils may lead to increased wear and GPF contamination.
Comprehensive technical documentation and regulatory references
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DVLA: Engine Changes & MoT
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Vehicle Certification Agency (VCA)
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Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
WLTP and RDE testing procedures for emissions certification.
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