The Aston Martin 1LR-GUE is a 4,497 cc, naturally aspirated V8 petrol engine produced between 2020 and 2025. Originally developed by Toyota for the Lexus LFA, it features a 72° V8 configuration, DOHC 32-valve heads, and dry-sump lubrication. In standard tune, it produces 412 kW (560 PS) and 480 Nm of torque, with a redline of 9,000 rpm, delivering high-revving performance and linear power delivery. The engine features individual throttle bodies per cylinder and a forged titanium connecting rod set for optimal responsiveness and durability.
Fitted to the Valkyrie AMR Pro and select track-only variants, the 1LR-GUE was engineered for maximum performance and track-focused dynamics. Its integration into Aston Martin’s carbon-fiber monocoque includes bespoke engine mounts and exhaust tuning. Emissions compliance is achieved through direct fuel injection and advanced ECU mapping, allowing the engine to meet Euro 6d standards for road-legal track variants.
One documented update is the transition from Denso ECU firmware v2.1 to v2.3 in mid-2022, improving throttle mapping and gear-shift coordination (Aston Martin Engineering Bulletin 1LR-22-004). Additionally, early Valkyrie AMR Pro models exhibited intermittent crankshaft position sensor signal instability under high thermal load. From 2021, revised sensor shielding and routing per Service Information Bulletin 1LR-SIB-21-005 were implemented to mitigate electromagnetic interference.
Road-legal Valkyrie AMR Pro models comply with Euro 6d emissions standards (VCA UK Type Approval #VCA/EMS/9567); track-only variants are not emissions-certified.
The Aston Martin 1LR-GUE is a 4,497 cc naturally aspirated V8 petrol engine engineered for high-performance track applications (2020–2025). It features a 72° aluminum block, DOHC 32-valve heads, and dry-sump lubrication to deliver strong mid-range torque and high-RPM power. Sourced from Toyota but integrated with Aston Martin-specific calibration and ancillaries, it meets Euro 6d standards where applicable while supporting FIA Hypercar compliance.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 4,497 cc | |
| Fuel type | Petrol | |
| Configuration | 72° V8, DOHC, 32-valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 94.0 mm × 80.5 mm | |
| Power output | 412 kW (560 PS) @ 8,700 rpm | |
| Torque | 480 Nm @ 6,800 rpm | |
| Fuel system | Direct injection, Denso ECU v2.3 | |
| Emissions standard | Euro 6d (road models); track-only exempt | |
| Compression ratio | 12.0:1 | |
| Cooling system | Water-cooled, dual-circuit | |
| Turbocharger | N/A | |
| Timing system | Chain-driven (dual overhead camshafts) | |
| Oil type | Red Line 5W-50 Racing Oil (Aston Martin Specification WSS-M2C955-A1) | |
| Dry weight | 202 kg |
The naturally aspirated 1LR-GUE provides F1-like throttle response ideal for track use, but demands strict adherence to 10,000 km oil change intervals using Red Line 5W-50 (WSS-M2C955-A1) to maintain dry-sump system integrity and chain longevity. The engine's Toyota heritage ensures parts commonality with select LFA units, though intake, exhaust, and ECU tuning are model-specific. Early models (pre-2021) may exhibit crankshaft sensor signal instability under sustained high load; verify shielding and routing per SIB 1LR-SIB-21-005 if misfires occur. Fuel quality is critical—race-grade unleaded (RON 102) is required to prevent knock and preserve performance. Cooling system maintenance is essential due to extreme thermal loads; inspect radiator integrity and pump seals during post-track inspections.
Oil Specs: Requires Red Line 5W-50 meeting Aston Martin WSS-M2C955-A1 (Aston Martin SIB 1LR-21-004). Formulated for high-G operation and dry-sump systems.
Emissions: Euro 6d certification applies to road-legal Valkyrie AMR Pro models only (VCA Type Approval #VCA/EMS/9567). Track-only variants are not emissions-certified.
Power Ratings: Measured under SAE J1349 standards. 412 kW output requires RON 102 fuel and precise ignition mapping (Aston Martin TIS Doc. 1LR-ECU-024).
Aston Martin Technical Information System (TIS): Docs 1LR-ENG-001, 1LR-ENG-002, SIB 1LR-SIB-21-005
VCA Type Approval Database (VCA/EMS/9567)
SAE International: J1349 Engine Power Certification Standards
The Aston Martin 1LR-GUE was used across Aston Martin's carbon-fiber monocoque with rear-mid mounting and sourced from Toyota as part of the LFA program. This engine received model-specific calibrations-aerodynamic cooling ducting in the Valkyrie AMR Pro and revised oil management in the track-only variant-and from 2022 the Valkyrie LMH adopted the 1LR-GUE Evo with increased displacement and revised cam profiles, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine serial number laser-etched on the upper rear face of the engine block near the bellhousing (Aston Martin TIS 1LR-ID-001). The 7th VIN digit indicates engine type ('1' for 1LR series). All units have black anodized cam covers with 'LFA' badging for heritage continuity. Critical differentiation from Toyota 1LR-GUE: Aston Martin version features bespoke intake manifolds, throttle bodies, and Denso ECU calibration. Service parts require model-year verification—crankshaft sensors for pre-2021 units are incompatible with post-2021 models due to shielding upgrade per SIB 1LR-SIB-21-005.
The 1LR-GUE's primary reliability risk is crankshaft position sensor signal instability on pre-2021 units, with elevated incidence in high-temperature environments. Internal Aston Martin service reports from 2021 indicated intermittent misfires under sustained high-RPM operation, while FIA technical logs show related power interruptions in early AMR Pro events. Track-focused use and aggressive driving increase EMI exposure, making use of revised harness shielding critical.
Analysis derived from Aston Martin technical bulletins (2020-2025) and FIA technical inspection reports (2021-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about ASTON-MARTIN 1LR-GUE.
Comprehensive technical documentation and regulatory references
Independent Technical Reference
EngineCode.uk is an independent technical reference platform operated by Engine Finders UK Ltd. We are not affiliated with ASTON-MARTIN or any other manufacturer. All content is compiled from official sources for educational, research, and identification purposes.
Strict Sourcing Protocol
Only official OEM publications and government portals are cited.
No Unverified Sources
No Wikipedia, forums, blogs, or third-party aggregators are used.
Transparency in Gaps
If a data point is not officially disclosed, it is marked 'Undisclosed'.
Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
ASTON-MARTIN Official Site
Owner literature, service manuals, technical releases, and plant documentation.
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.
Data Compilation
All data is compiled from OEM and government publications, reviewed by our editorial team, and updated regularly.
Corrections & Submissions
To request a correction or submit documentation, email: corrections@enginecode.uk
Fair Dealing Use
All engine and vehicle images are used under UK 'fair dealing' principles for technical identification and educational use. Rights remain with their respective owners.
Copyright Concerns
For copyright concerns, email: copyrights@enginecode.uk
GDPR Compliance
EngineCode.uk complies with UK GDPR. We do not collect personal data unless explicitly provided.
Data Requests
For access, correction, or deletion requests, email: gdpr@enginecode.uk
Trademark Notice
All trademarks, logos, and engine codes are the property of their respective owners. Use on this site is strictly for reference and identification.
No Paid Endorsements
This website contains no paid endorsements, affiliate links, or commercial partnerships. We do not sell parts or services.
Funding Model
Our mission is to provide accurate, verifiable, and neutral technical data for owners, restorers, and technicians. This site is self-funded.
All specifications and compatibility data verified against officialASTON-MARTIN documentation and EU/UK regulatory texts. Where official data is unavailable, entries are marked “Undisclosed“ .
All external links open in new tabs. Please verify current availability of resources.
