The GM LTA – Petrol is a 1,490 cc, inline‑three turbocharged engine produced from 2023 onwards. It features a dual overhead camshaft (DOHC) design with variable valve timing (VVT) and direct fuel injection, delivering responsive performance from its compact displacement. In standard form, it produces 107 kW (145 PS) and 230 Nm of torque, making it suitable for entry-level performance in small vehicles.
Fitted primarily to the Opel/Vauxhall Astra and Grandland, the LTA – Petrol was engineered for agile urban and highway driving, prioritizing low-end torque and fuel efficiency. Emissions compliance for its production period is met through direct injection and a gasoline particulate filter (GPF), aligning with Euro 6d standards across all markets.
A documented service consideration is the potential for carbon buildup on intake valves, inherent to its direct-injection system. This trait, noted in GM Service Bulletin #23-01-10-001, can affect idle quality over time. The engine represents GM's current generation of efficient three-cylinder powertrains and has no major revisions to date.
Production years 2023–Present meet Euro 6d standards (VCA UK Type Approval #VCA/EMS/9023).
The GM LTA – Petrol is a 1,490 cc inline‑three turbocharged engine engineered for compact vehicles (2023-Present). It combines direct fuel injection with a small, single-scroll turbocharger to deliver brisk low-end response and competitive fuel economy. Designed to meet stringent Euro 6d standards, it balances urban agility with highway refinement.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,490 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑3, DOHC, 12‑valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 74.0 mm × 86.6 mm | |
| Power output | 107 kW (145 PS) @ 5,000-5,500 rpm | |
| Torque | 230 Nm @ 1,750-4,000 rpm | |
| Fuel system | Gasoline Direct Injection (GDI) | |
| Emissions standard | Euro 6d | |
| Compression ratio | 10.0:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Single-scroll (Mitsubishi Heavy Industries) | |
| Timing system | Chain-driven | |
| Oil type | GM Dexos 2 (SAE 5W‑30) | |
| Dry weight | 106 kg |
The turbocharged three-cylinder layout provides eager low-end torque ideal for city driving but requires strict adherence to 15,000 km oil change intervals using GM Dexos 2 oil to mitigate carbon buildup on intake valves. The timing chain is designed for longevity but should be inspected if unusual noise develops. Using premium fuel (95 RON or higher) is recommended for optimal injector cleanliness and performance. The GPF requires periodic high-speed driving to regenerate and prevent blockage.
Oil Specs: Requires GM Dexos 2 (5W-30) specification (GM Owner's Manual). This low-SAPS oil is mandatory for GPF compatibility.
Emissions: Euro 6d certification applies to all 2023–Present models (VCA Type Approval #VCA/EMS/9023).
Power Ratings: Measured under SAE J1349 standards. Output is consistent across specified fuel quality (95 RON minimum).
GM Technical Information System (TIS): Docs MECH-923, FUEL-890, COOL-145
GM Service Information Bulletin (SIB) #23-01-10-001
VCA Type Approval Database (VCA/EMS/9023)
The GM LTA – Petrol was used across GM's global EMP2 platform with transverse mounting. This engine received platform-specific adaptations-including unique engine mounts for the Opel Grandland and revised cooling packages for the Opel Astra-creating minor interchange considerations. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front of the engine block, near the alternator (GM TIS MECH-923). The 8th digit of the VIN typically corresponds to the engine type ('A' for this 1.5T variant). Visually, the engine features a black plastic cam cover with "ECOTEC" branding and a visible turbocharger on the rear (exhaust side). Critical differentiation from earlier 1.5T variants: this engine has a specific ECU calibration and GPF. Service parts are generally consistent across all model years.
The LTA – Petrol's primary reliability consideration is intake valve carbon buildup, a systemic trait of its direct-injection design. GM internal service data indicates this is a manageable maintenance item rather than a critical failure point. Adherence to the specified oil type and driving patterns that allow GPF regeneration are key to long-term performance.
Analysis derived from GM technical bulletins (2023-2023) and aggregated owner-reported data (2023-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about GM LTA.
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 GM 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.
GM 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 officialGM 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.
