The MG 1.5T GDI – Petrol (SAIC) is a 1,490 cc, inline‑four turbocharged petrol engine introduced in 2019. It features gasoline direct injection (GDI), a single-scroll turbocharger, and dual overhead camshafts (DOHC). This powertrain delivers a balance of performance and efficiency, with outputs typically around 119 kW (161 PS) and 250 Nm of torque, making it suitable for MG's modern SUV lineup.
Fitted primarily to the MG ZS and MG HS models, this engine was engineered for responsive urban driving and confident highway cruising. Emissions compliance is achieved through a close-coupled three-way catalytic converter and precise fuel metering, meeting Euro 6d standards across its production run. The engine's character prioritizes smooth power delivery over outright sportiness.
One documented area for attention is potential carbon buildup on intake valves, a known characteristic of direct injection engines without secondary port injection. This is addressed in SAIC service recommendations which emphasize periodic inspection and cleaning procedures. No major generational overhaul has been documented; updates have been primarily focused on ECU calibration for emissions.
All production years (2019–Present) meet Euro 6d emissions standards for UK and EU markets (VCA UK Type Approval #VCA/EMS/MG15T).
The MG 1.5T GDI – Petrol (SAIC) is a 1,490 cc inline‑four turbocharged petrol engine engineered for compact SUVs (2019-Present). It combines gasoline direct injection with a single-scroll turbocharger to deliver responsive low-to-mid range torque and efficient highway cruising. Designed to meet stringent Euro 6d standards, it balances everyday usability with modern emissions compliance.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,490 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 75.0 mm × 84.0 mm | |
| Power output | 119 kW (161 PS) | |
| Torque | 250 Nm @ 1,700–4,400 rpm | |
| Fuel system | Gasoline Direct Injection (GDI), 200 bar | |
| Emissions standard | Euro 6d | |
| Compression ratio | 10.0:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Single-scroll turbocharger (MHI or BorgWarner) | |
| Timing system | Chain-driven | |
| Oil type | SAE 5W-30 (ACEA C2/C3 specification) | |
| Dry weight | Not Published |
The turbocharged GDI system provides strong mid-range pull ideal for overtaking but requires adherence to 10,000-15,000 km oil change intervals using low-SAPS (C2/C3) oil to protect the turbocharger and emissions systems. The absence of port injection makes periodic intake valve cleaning advisable to maintain optimal airflow and prevent rough idle. The timing chain is designed for longevity but should be inspected for tension and noise during major services. Using premium (95 RON) fuel is recommended for optimal performance and to minimize carbon deposits.
Oil Specs: Requires ACEA C2 or C3 low-SAPS oil (SAE 5W-30) (SAIC Motor Owner's Manual). Critical for DPF and turbo longevity.
Emissions: Euro 6d certification applies to all models from 2019 onwards (VCA Type Approval #VCA/EMS/MG15T). Includes RDE compliance.
Power Ratings: Measured under ISO 1585 standards. Output is consistent across ZS and HS applications (SAIC Motor PT-2022).
SAIC Motor Technical Information System (TIS): Docs ENG-15T-01, FUE-15T-03, TUR-15T-02
VCA Type Approval Database (VCA/EMS/MG15T)
ISO 1585: Road vehicles — Engine test code — Net power
The MG 1.5T GDI – Petrol (SAIC) was used across MG's compact SUV platforms with transverse mounting. This engine received platform-specific ECU calibrations for the ZS and HS to optimize throttle response and emissions. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front of the cylinder block, near the gearbox flange. The VIN's 4th, 5th, and 6th digits typically encode the model (e.g., 'ZS' or 'HS'), while the 8th digit often specifies the engine type. Visually, the engine is identifiable by its black plastic intake manifold and top-mounted turbocharger inlet. Critical differentiation: Ensure parts are specific to the 1.5T GDI (L3A) and not the older 1.5L naturally aspirated unit. ECU software versions vary between ZS and HS; flashing requires model-specific files per SAIC TIS procedures.
The 1.5T GDI's primary long-term consideration is intake valve carbon buildup, common to direct-injection engines. SAIC service schedules recommend inspection from 60,000 km, while owner feedback often notes improved idle smoothness after cleaning. Extended oil change intervals or using non-specified oil can accelerate deposit formation and turbo wear, making adherence to maintenance schedules critical.
Analysis derived from SAIC Motor technical bulletins (2019-2024) and UK DVSA failure statistics (2020-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about MG 1-5T-GDI.
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DVLA: Engine Changes & MoT
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Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
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