The Aston Martin N420R is a 3,995 cc, twin-turbocharged V8 petrol engine developed in-house for the DB12 and Vantage GT4 racing applications. It features a 90° V configuration, dry-sump lubrication, and direct fuel injection, delivering 545 kW (741 PS) at 6,250 rpm and 800 Nm of torque from 2,750–5,500 rpm. This engine represents a motorsport-focused evolution of Aston Martin’s AM01 architecture, optimized for high-RPM performance and track durability.
Fitted to the DB12 and Vantage GT4, the N420R was engineered to deliver race-bred responsiveness within a road-legal grand tourer. Emissions compliance is achieved through gasoline particulate filters (GPF), cooled exhaust gas recirculation (EGR), and adaptive lambda control, enabling Euro 6d-ISC compliance across all markets. The engine’s compact design and front-mid longitudinal mounting contribute to optimal weight distribution and enhanced dynamic balance for circuit use.
One documented update occurred in early 2025 with revised camshaft profiles and updated engine management software to improve high-RPM breathing, as detailed in Aston Martin Service Information Bulletin AM-SIB-14-2025. This update was implemented to enhance power delivery above 6,000 rpm for track-focused drivers. No widespread reliability concerns have been reported through Aston Martin’s internal quality tracking system (2024–2025), with VCA in-service monitoring confirming consistent emissions compliance.
Production years 2024–present meet Euro 6d-ISC standards (VCA UK Type Approval #VCA/EMS/9842).
The Aston Martin N420R is a 3,995 cc twin-turbo V8 petrol engine (2024–present) developed for high-performance GT and motorsport 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 | 3,995 cc | |
| Fuel type | Petrol (Unleaded, 95 RON min) | |
| Configuration | 90° V8, DOHC, 32-valve | |
| Aspiration | Twin-turbocharged (hot-V layout) | |
| Bore × stroke | 86.0 mm × 85.8 mm | |
| Power output | 545 kW (741 PS) @ 6,250 rpm | |
| Torque | 800 Nm @ 2,750–5,500 rpm | |
| Fuel system | Direct injection (Bosch ME17.9.6) | |
| Emissions standard | Euro 6d-ISC (WLTP/RDE) | |
| Compression ratio | 10.9:1 | |
| 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-007) | |
| Dry weight | 189 kg |
The hot-V turbo configuration provides immediate throttle response and high specific output but demands adherence to 15,000 km oil service intervals to ensure turbocharger and timing system longevity. AMOB-007 (0W-20) oil is essential for optimal variable valve timing actuator performance and piston cooling jet lubrication. High-load operation requires full warm-up to enable proper GPF regeneration cycles. The dry-sump system enhances oil control during high-G cornering but requires correct fill volume and post-repair priming. Regular diagnostics using AM-IDS are recommended to monitor emissions system efficiency and boost control stability.
Oil Specs: Requires Aston Martin AMOB-007 (0W-20) specification (Aston Martin SIB AM-01-012). Meets ACEA C5 and API SP.
Emissions: Euro 6d-ISC certification applies to all 2024+ models (VCA Type Approval #VCA/EMS/9842). Real-driving emissions (RDE) and in-service conformity (ISC) compliant.
Power Ratings: Measured under ECE R85 standards. Full output requires 98 RON fuel (Aston Martin TIS Doc. AM-N420R-001).
Aston Martin Technical Information System (TIS): Docs AM-N420R-001, AM-FUEL-022, AM-TIMING-020
VCA Type Approval Database (VCA/EMS/9842)
European Commission Regulation (EC) No 715/2007
The Aston Martin N420R was used across Aston Martin's DB and Vantage platforms with longitudinal mounting and is not licensed to other manufacturers. This engine received platform-specific tuning-for increased high-RPM power delivery in the Vantage GT4 race car-and from 2025 integrates revised camshaft profiles per AM-SIB-14-2025, creating interchange limits with pre-2025 variants. All adaptations are documented in OEM technical bulletins.
Locate the engine identification plate on the front-left cylinder bank (Aston Martin TIS AM-ID-007). The 7th and 8th characters of the VIN denote the engine code ('N4' for N420R series). Visually, the N420R features a central intake plenum, twin Honeywell turbochargers in a hot-V configuration, and a dry-sump reservoir on the right side. Critical differentiation from prior V8s: N420R has motorsport-grade internals, revised cam profiles, and a track-optimized ECU map. Service parts require VIN-based verification due to race/non-race variants and 2025 camshaft revisions.
The N420R'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 2025 show low field failure rates (<0.5%) across the first year, 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 (2024-2025) and UK VCA in-service emissions monitoring (2024-2025). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about ASTON-MARTIN N420R.
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).
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DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
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.
GOV.UK: Vehicle Approval
UK compliance and certification requirements for imported and modified vehicles.
VCA Certification Portal
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