1.5 VTi-TECH / T-GDI vs 1.2 8v: which engine is more reliable?

According to our risk index, the 1.5 VTi-TECH / T-GDI carries less risk than the 1.2 8v: 7/100 (low risk) versus 36/100 (moderate risk). The 1.5 VTi-TECH / T-GDI has no documented serious faults; the 1.2 8v has 1 documented serious fault, the main one being «Damaged cylinder head gasket (coolant loss and overheating)».

Risk index

1.5 VTi-TECH / T-GDI

Low risk · 0 serious faults

Lower risk

Risk index

1.2 8v

Moderate risk · 1 serious fault

The index (0–100) weights the severity and frequency of the three most serious documented faults. How it is calculated

Reviewed on 2 November 202620 sources How we work

Is the 1.5 VTi-TECH / T-GDI reliable?

MG/SAIC's "1.5" covers two different engines: the naturally aspirated VTi-TECH (106 hp), the entry-level engine in the MG ZS, and the turbocharged T-GDI (162-170 hp), found only in the MG HS and as the petrol engine in its plug-in hybrids. Neither has well-documented engine faults in independent sources yet: the complaints published concern electronics, the automatic gearbox and finish, not the engine block.^{[1][2][3][4][5][6]}

See the 2 of the 1.5 VTi-TECH / T-GDI faults

Is the 1.2 8v reliable?

The 1.2 8v (D7F) is a simple naturally aspirated engine of 54 to 60 hp, with a timing belt, which Renault fitted from 1996 to the Twingo, Clio II and Kangoo. No catastrophic failures are documented; what owner reviews mention most often are the sensors, the cylinder head gasket, the coil packs and the occasional oil drip.^[7][8][9]

See the 5 of the 1.2 8v faults

Side-by-side comparison

Comparison of 1.5 VTi-TECH / T-GDI and 1.2 8v
Item	1.5 VTi-TECH / T-GDI	1.2 8v
Technical data
Type	Engine	Engine
Fuel	Petrol	Petrol
Displacement	—	1,149 cm³
Timing	Chain	Timing belt (dry)
Power	106–170 hp	54–60 hp
Production	since 2017^{[1][2][10][11][12]}	1996–2012^{[13][14][15][16]}
Reliability
Risk index (what is it?)	7Low risk	36Moderate risk
Documented faults	2	5
Of high or critical severity	0	1
Worst severity	Low severity	High severity
Main faults	Low severity: Jerky or harsh automatic gearbox shifts when cold or at low speed (MG HS) Low severity: Electronic warnings and occasional sensor faults (MG HS)	High severity: Damaged cylinder head gasket (coolant loss and overheating) Medium severity: Crankshaft sensor (TDC) and other engine sensor failure Medium severity: Ignition faults: coil packs, ignition harness and humidity
Most expensive documented repair	No reliable data	No reliable data
Which versions to buy
BuyRecommended versions	1.5 VTi-TECH naturally aspirated 106 hp (NSE / NSE Plus, from 2017)^[4] 1.5 VTi-TECH naturally aspirated 106 hp (15S4C, MG3, 2013–2024)^[17]	None
With cautionVersions to be cautious about	1.5 T-GDI turbo 162 hp (GS61H, 2018-2024)^{[5][6][18][19]} 1.5 T-GDI turbo 170 hp (15FDE / 15FKE, from 2024)^[2]	1.2 8v 54-60 hp (D7F, 1996-2012)^{[7][8][9][20]}
AvoidVersions to avoid	None	None

Severity of each fault: green, low; amber, medium; red, high; dark red, critical. How we rate them

Cars that each one is fitted to

1.5 VTi-TECH / T-GDI

1.2 8v

Other comparisons

With the 1.5 VTi-TECH / T-GDI

With the 1.2 8v

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Sources

Every fact on this page links to its source. If you find an error, let us know.

MG ZS (crossover)Wikipedia (inglés) · Other source · consulted 27 September 2026
MG HSWikipedia (inglés) · Other source · consulted 27 September 2026
Essai complet : MG ZSFiches-Auto.fr · Motoring press · consulted 27 September 2026 · in French
Fiabilité et pannes du MG ZSFiches-Auto.fr · Motoring press · consulted 27 September 2026 · in French
Fiabilité et pannes du MG eHSFiches-Auto.fr · Motoring press · consulted 27 September 2026 · in French
MG HS PHEV: guía definitiva de problemas y soluciones del SUV, el híbrido enchufable más vendidoAutopista.es · Motoring press · published 10 November 2025 · consulted 27 September 2026 · in Spanish
Fiabilité Renault Clio 2 : pannes et avis des propriétairesFiches-auto.fr · Motoring press · consulted 2 November 2026 · in French
Fiabilité Renault Twingo 1993-2006 : pannes et avis des propriétairesFiches-auto.fr · Motoring press · consulted 2 November 2026 · in French
Fiabilité Renault Twingo 2 (2007-2014) : pannes et avis des propriétairesFiches-auto.fr · Motoring press · consulted 2 November 2026 · in French
MG HSWikipedia (alemán) · Other source · consulted 27 September 2026 · in German
MG HSWikipedia (francés) · Other source · consulted 27 September 2026 · in French
List of General Motors enginesWikipedia (inglés) · Other source · consulted 27 September 2026
Moteur D (Renault)Wikipédia (francés) · Other source · consulted 2 November 2026 · in French
Renault Clio IIWikipedia (alemán) · Other source · consulted 2 November 2026 · in German
Renault TwingoWikipedia (alemán) · Other source · consulted 2 November 2026 · in German
Renault Twingo IWikipedia (alemán) · Other source · consulted 2 November 2026 · in German
Témoignages de fiabilité MG (MG3 1.5 VTi-Tech 106 ch sin testimonios; solo los del híbrido de 2024)Fiches-auto.fr · Owners' forum · consulted 2 November 2026 · in French
MG – Common problems (llamadas a revisión de la UE y del Reino Unido)car-recalls.eu · Other source · consulted 30 October 2026
MG HS SUV (2019-2024) Exclusive 1.5T-GDI 5d: opinión de propietario (10 jun 2022)Parkers · Owners' forum · published 10 June 2022 · consulted 30 October 2026
Renault Twingo (ab 1993): Schwachstellen laut TÜV-AuswertungAUTO BILD · Motoring press · published February 2002 · consulted 2 November 2026 · in German