The Aston Martin AJ — V8 Gen III is a 4,230 cc, V8 petrol engine produced between 2005 and 2012. It features a 90° V8 configuration, DOHC valvetrain, and Ford/Jaguar — derived port fuel injection, delivering 250 kW (340 PS) and 410 Nm of torque. Its compact design and responsive throttle were engineered for agile grand touring dynamics, with a redline of 6,500 rpm.
Fitted to the DB9, V8 Vantage, and Rapide, this engine was adapted from the Ford — sourced AJ — V8 family and modified…
Production years 2005–2012 meet Euro 4 standards (VCA UK Type Approval #VCA/EMS/3421).
The Aston Martin AJ-V8 Gen III is a 4,230 cc V8 petrol engine developed from Ford/Jaguar's AJ-V8 platform (2005–2012). It features a 90° V8 layout with dual overhead camshafts and sequential port fuel injection, delivering responsive throttle characteristics and strong mid-range torque. Designed to meet Euro 4 emissions standards, it balances compact packaging with performance-oriented engineering.
| Parameter | Value | Source |
|---|---|---|
Displacement | 4,230 cc | |
Fuel type | Petrol | |
Configuration | 90° V8, DOHC, 32-valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 94.0 mm × 76.0 mm | |
Power output | 250 kW (340 PS) @ 6,000 rpm | |
Torque | 410 Nm @ 4,500 rpm | |
Fuel system | Ford sequential port injection | |
Emissions standard | Euro 4 | |
Compression ratio | 10.5:1 | |
Cooling system | Water-cooled | |
Turbocharger | N/A | |
Timing system | Dual chain (front-mounted, 120,000 km interval) | |
Oil type | Aston Martin M-spec 5W-50 | |
Dry weight | 198 kg |
The Aston Martin AJ-V8 Gen III was used in the DB and VB platforms with longitudinal mounting and developed under Ford/Jaguar collaboration. This engine received platform-specific tuning—optimized intake manifolds in the V8 Vantage and revised exhaust headers in facelifted variants—and from 2008 the updated V8 Vantage S adopted a higher-lift cam profile and modified ECU calibration, creating interchange limits. All adaptations are documented in OEM technical bulletins.
The AJ-V8 Gen III's primary reliability risk is inlet manifold runner actuator wear, with elevated incidence in high-temperature climates. Internal Aston Martin field reports from 2007 indicated a measurable number of pre-2008 engines requiring actuator replacement before 90,000 km, while UK DVSA data shows idle-related faults in stop-start urban driving. Short trips and low-load operation increase thermal stress and oil degradation, making high-quality oil and regular highway runs critical.
Analysis derived from Aston Martin technical bulletins (2005–2012) and UK DVSA failure statistics (2006–2015). Repair procedures should follow manufacturer guidelines.
The most common questions about engine codes, what they mean, how to find them and how this database works
The AJ-V8 Gen III offers refined performance and smooth operation, but early models (2005–2007) had inlet actuator issues. Later revisions (2008+) improved actuator durability. With strict maintenance and use of high-octane fuel, these engines can achieve 140,000 km reliability. Regular oil changes and proper warm-up routines are essential for longevity.
Key issues include inlet manifold actuator wear, timing chain tensioner wear, intake vacuum leaks, and VVT solenoid clogging. These are documented in Aston Martin service bulletins. Preventive maintenance significantly reduces risk of major repairs.
The AJ-V8 Gen III powers the DB9 (2005–2012), V8 Vantage (2005–2012), and Rapide (2009–2012). It is longitudinally mounted and tuned for each platform’s performance character. No cross-manufacturer applications are documented.
Yes. The AJ-V8 Gen III responds well to ECU remapping, with stage 1 tunes typically adding +30–50 kW. Upgraded exhausts, intake systems, and camshafts allow higher gains. Tuning must preserve valve timing and thermal management limits to avoid reliability issues.
In combined driving, expect ~13.8 L/100km (20.5 mpg UK). Highway cruising can achieve ~10.2 L/100km (27.7 mpg UK), while city driving may exceed 16 L/100km (17.7 mpg UK). Real-world consumption depends heavily on driving style and fuel quality.
Yes. The AJ-V8 Gen III is an interference engine. If the timing chain fails, piston-to-valve contact will cause catastrophic internal damage. Regular inspection of the chain and tensioner is critical to prevent costly engine rebuilds.
Aston Martin specifies M-spec 5W-50 synthetic oil. Change intervals are 12,000 km or annually. Using correct oil ensures proper turbo, chain, and VVT system lubrication, reducing wear and maintaining performance.
Comprehensive technical documentation and regulatory references
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ASTON-MARTIN Official Site
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EUR-Lex
EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
GOV.UK: Vehicle Approval & V5C
UK vehicle approval processes, import rules, and MoT guidance.
DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
Vehicle Certification Agency (VCA)
UK type-approval authority for automotive products.
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.
GOV.UK: Vehicle Approval
UK compliance and certification requirements for imported and modified vehicles.
VCA Certification Portal
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