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…
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 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.
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.
The most common questions about engine codes, what they mean, how to find them and how this database works
The GM LTA – Petrol is designed for reliability with proper maintenance. Its main known consideration is intake valve carbon buildup, which is manageable with periodic cleaning. The turbocharger and timing chain are robust. Using the correct GM Dexos 2 oil and adhering to service intervals is crucial. Many examples are expected to exceed 150,000 km without major issues.
The most frequent issues are carbon buildup on intake valves (causing rough idle) and potential GPF blockage from short-trip driving. High-pressure fuel pump failure and oil leaks from the cam cover are also reported as the engine ages. These are well-documented in GM service information.
This 1.5L turbo engine is used in the current generation Opel/Vauxhall Astra L (2023-Present) and Opel Grandland (2023-Present). It's a key engine for GM's compact car and crossover lineup in Europe, offering a balance of performance and efficiency.
Yes, the LTA responds well to ECU remapping. Stage 1 tunes can reliably produce around 125-130 kW (170-175 PS) and 260-270 Nm of torque by adjusting boost pressure and ignition timing. The stock internals are strong enough for these gains. More power requires upgraded turbo and injectors.
Real-world fuel economy is around 6.5-7.5 L/100km (38-43 mpg UK) combined, depending on the vehicle and driving style. Highway cruising can achieve 5.5 L/100km (51 mpg UK), while city driving may consume 8.5 L/100km (33 mpg UK). It's efficient for a turbocharged performance engine.
Yes. The GM LTA – Petrol is an interference engine. If the timing chain fails or jumps, the pistons will collide with the open valves, causing catastrophic internal damage. This underscores the importance of addressing any timing chain noise immediately, although failures are rare.
GM mandates the use of Dexos 2 specification oil, typically in 5W-30 viscosity. This low-SAPS (Sulphated Ash, Phosphorus, Sulphur) oil is crucial for protecting the turbocharger, GPF, and emissions components. Using non-Dexos oil can void warranties and lead to premature wear.
Comprehensive technical documentation and regulatory references
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GM Official Site
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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)
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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.
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