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 t…
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 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.
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.
The most common questions about engine codes, what they mean, how to find them and how this database works
The 1LR-GUE is highly robust when operated within design parameters, but pre-2021 models are prone to crankshaft sensor signal instability. Later revisions (post-2021) improved harness shielding. Regular oil changes with correct 5W-50 specification and post-track inspections are essential. Well-maintained engines can exceed 30,000 km in road use or 500 hours in track service without major issues.
The most frequent issues are crankshaft position sensor signal instability (especially pre-2021), throttle body linkage wear, ignition coil failures at high RPM, and exhaust manifold cracking. These are documented in Aston Martin service bulletins and supported by Cosworth engineering reports from track programs.
The 1LR-GUE powers the Valkyrie AMR Pro (2020–2025). It was sourced from Toyota's LFA program and is not used in any other production vehicle. Each application features model-specific tuning and oil management systems tailored to road or track use.
Limited tuning potential due to extreme factory calibration. ECU remapping can yield +10–15 kW gains safely. Mechanical upgrades (camshafts, intake) exist but are rare. Forced induction is not feasible due to block and head design. Tuning should preserve reliability and use race-grade fuel to prevent detonation.
Not applicable in traditional terms. The 1LR-GUE is optimized for track performance, not efficiency. In road-legal Valkyrie AMR Pro models, fuel consumption is approximately ~24 L/100km (city) and ~17 L/100km (highway), or 12 mpg UK combined. Real-world usage depends heavily on driving style and fuel type.
Yes. The 1LR-GUE is an interference engine. If the timing chain fails or jumps, pistons will contact open valves, causing catastrophic damage. Chain-driven system is highly durable but requires expert servicing. Any timing work must be performed by authorized technicians using OEM tools.
Aston Martin specifies Red Line 5W-50 racing oil meeting WSS-M2C955-A1 standard. Oil must be changed every 10,000 km or 12 months. Using incorrect oil can accelerate bearing and chain wear due to extreme RPM and high-G loads inherent to the Valkyrie platform.
Comprehensive technical documentation and regulatory references
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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.
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