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…
Production years 2024–present meet Euro 6d-ISC standards .
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 | Refer to vehicle handbook / manufacturer specification | |
Dry weight | 189 kg |
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.
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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.
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Yes. As a modern in-house V8 (2024–present), the N420R has demonstrated strong reliability in Aston Martin’s internal quality reports, with failure rates below 0.5% over its first year. The dual-chain timing and robust turbo design are durable when maintained with correct oil (AMOB-007 0W-20) and service intervals. The 2025 camshaft update improved high-RPM 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 valve train wear in high-RPM use. 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 2025 camshaft profile update (AM-SIB-14-2025) to improve breathing and reduce valve train stress.
The N420R is currently fitted to the DB12 (2024–present) and Vantage GT4 (2025–present). It is not used in any other manufacturer's vehicles and is exclusively tuned and calibrated by Aston Martin for GT and motorsport 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.
Aftermarket ECU tuning is common on the N420R platform, but increasing boost or altering engine parameters accelerates component wear, impacts emissions compliance, and may void vehicle warranties. Any modifications should be evaluated carefully by a qualified specialist.
Official WLTP combined consumption is 14.8 L/100 km (~19.1 mpg UK). Real-world figures vary significantly: expect 16–20 L/100 km (~14.1–17.7 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 11.5 L/100 km (~24.4 mpg UK). GPF regeneration cycles temporarily increase fuel use.
Yes. The N420R 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-007 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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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
Type-approval guidance and documentation.
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