1.4 and 1.6 8v vs 1.2 8v: which engine is more reliable?

According to our risk index, the 1.2 8v carries less risk than the 1.4 and 1.6 8v: 36/100 versus 48/100 (both moderate risk). The 1.4 and 1.6 8v has 3 documented serious faults, the main one being «LPG tank corrosion»; the 1.2 8v has 1 documented serious fault, the main one being «Damaged cylinder head gasket (coolant loss and overheating)».

Risk index

1.4 and 1.6 8v

Moderate risk · 3 serious faults

Risk index

1.2 8v

Moderate risk · 1 serious fault

Lower risk

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

Reviewed on 2 November 202614 sources How we work

Is the 1.4 and 1.6 8v reliable?

The K7J (1.4) and K7M (1.6) are the original 8-valve, single-camshaft versions of Renault's «K» family: simple naturally aspirated engines that are, on the whole, reliable. None of the sources consulted documents oil consumption or faults that destroy the block. The most frequently cited weak points are the crankshaft sensor, the head gasket and the ignition coils; on Dacia's LPG versions, corrosion of the gas tank is added to the list.^[1][2][3]

See the 5 of the 1.4 and 1.6 8v 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.^[1][4][5]

See the 5 of the 1.2 8v faults

Side-by-side comparison

Comparison of 1.4 and 1.6 8v and 1.2 8v
Item	1.4 and 1.6 8v	1.2 8v
Technical data
Type	Engine	Engine
Fuel	Petrol	Petrol
Displacement	—	1,149 cm³
Timing	Timing belt (dry)	Timing belt (dry)
Power	75–90 hp	54–60 hp
Production	since 1995^[6][7][8]	1996–2012^{[9][10][11][12]}
Reliability
Risk index (what is it?)	48Moderate risk	36Moderate risk
Documented faults	5	5
Of high or critical severity	3	1
Worst severity	High severity	High severity
Main faults	High severity: LPG tank corrosion High severity: Timing belt breakage or failure High severity: Head gasket (and, in some cases, cylinder head)	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	None	None
With cautionVersions to be cautious about	1.4 8V 75 hp (K7J, 1995-2012)^{[1][2][3][13]} 1.6 8V 90 hp (K7M, 1995-2012)^[1][2] 1.4 8V 75 hp LPG (K7J 714, Dacia, 2008-2012)^[3]	1.2 8v 54-60 hp (D7F, 1996-2012)^{[1][4][5][14]}
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

1.4 and 1.6 8v

1.2 8v

Other comparisons

With the 1.4 and 1.6 8v

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.

Fiabilité et pannes de la Renault Clio 2Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Fiabilité et pannes du Dacia Logan 1Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Fiabilité et pannes du Dacia Sandero 1Fiches-auto.fr · Motoring press · consulted 27 September 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
Renault K-Type engineWikipedia (inglés) · Other source · consulted 27 September 2026
Moteur K RenaultWikipedia (francés) · Other source · consulted 27 September 2026 · in French
Anexo:Motores de RenaultWikipedia (español) · Other source · consulted 27 September 2026 · in Spanish
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
Fiabilité et pannes du Renault Kangoo 1Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Renault Twingo (ab 1993): Schwachstellen laut TÜV-AuswertungAUTO BILD · Motoring press · published February 2002 · consulted 2 November 2026 · in German