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MotorFiable

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

According to our risk index, the 1.2 8v carries less risk than the 1.6 THP: 36/100 (moderate risk) versus 64/100 (high risk). The 1.6 THP has 2 documented serious faults, the main one being «Timing chain and tensioner stretch (turbo versions, before 2012)»; the 1.2 8v has 1 documented serious fault, the main one being «Damaged cylinder head gasket (coolant loss and overheating)».

Risk index

1.6 THP

64

High risk · 2 serious faults

Risk index

1.2 8v

36

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

15 sourcesHow we work

Is the 1.6 THP reliable?

The 1.6 THP turbo and its naturally aspirated sibling, the 1.6 VTi, make up the Prince family, developed together with BMW and also used by MINI: they do not have a reputation for reliability. Turbo versions built before 2012 carry a known problem of timing chain stretch, and the whole block shares a water pump described as fragile; the turbo versions add oil consumption and high-pressure fuel pump failures.[1][2][3][4]

See the 5 of the 1.6 THP 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.[5][6][7]

See the 5 of the 1.2 8v faults

Side-by-side comparison

Comparison of 1.6 THP and 1.2 8v
1.6 THP1.2 8v
Technical data
TypeEngineEngine
FuelPetrolPetrol
Displacement1,598 cm³1,149 cm³
TimingChainTiming belt (dry)
Power120–270 hp54–60 hp
Production2006–2018[1][8][9]1996–2012[10][11][12][13]
Reliability
Risk index (what is it?)64High risk36Moderate risk
Documented faults55
Of high or critical severity21
Worst severityCritical severityHigh severity
Main faults
  1. Critical severity: Timing chain and tensioner stretch (turbo versions, before 2012)
  2. High severity: Fragile water pump and heat exchanger
  3. Medium severity: High-pressure fuel pump (HPFP) failure on the turbo versions
  1. High severity: Damaged cylinder head gasket (coolant loss and overheating)
  2. Medium severity: Crankshaft sensor (TDC) and other engine sensor failure
  3. Medium severity: Ignition faults: coil packs, ignition harness and humidity
Most expensive documented repairNo reliable dataNo reliable data
Which versions to buy
BuyRecommended versionsNoneNone
With cautionVersions to be cautious about
  • 1.6 VTi 120 / 1.6 16v (EP6/EP6C, N12/N16, naturally aspirated)[4]
  • 1.6 THP medium output (EP6DT/EP6DTS/EP6CDT, N14/N18; 140-190 hp)[2][3][14]
  • 1.6 THP high performance (EP6CDXD/EP6FDTR/EP6CDTR, John Cooper Works N14/N18; 200-270 hp)[2][3][4]
AvoidVersions to avoidNoneNone

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

Cars that each one is fitted to

Other comparisons

With the 1.6 THP

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.

  1. Prince engineWikipedia (inglés) · Other source · consulted 27 September 2026
  2. Distribution : les moteurs à problèmesFiches-auto.fr · Motoring press · published April 2025 · consulted 27 September 2026 · in French
  3. Moteurs essence qui consomment de l'huileFiches-auto.fr · Motoring press · published April 2024 · consulted 27 September 2026 · in French
  4. Liste des moteurs qui ont des soucis de refroidissementFiches-auto.fr · Motoring press · published April 2025 · consulted 27 September 2026 · in French
  5. Fiabilité Renault Clio 2 : pannes et avis des propriétairesFiches-auto.fr · Motoring press · consulted 2 November 2026 · in French
  6. Fiabilité Renault Twingo 1993-2006 : pannes et avis des propriétairesFiches-auto.fr · Motoring press · consulted 2 November 2026 · in French
  7. Fiabilité Renault Twingo 2 (2007-2014) : pannes et avis des propriétairesFiches-auto.fr · Motoring press · consulted 2 November 2026 · in French
  8. Peugeot 308Wikipedia (español) · Other source · consulted 27 September 2026 · in Spanish
  9. Peugeot RCZWikipedia (inglés) · Other source · consulted 27 September 2026
  10. Moteur D (Renault)Wikipédia (francés) · Other source · consulted 2 November 2026 · in French
  11. Renault Clio IIWikipedia (alemán) · Other source · consulted 2 November 2026 · in German
  12. Renault TwingoWikipedia (alemán) · Other source · consulted 2 November 2026 · in German
  13. Renault Twingo IWikipedia (alemán) · Other source · consulted 2 November 2026 · in German
  14. BMW Recalls Fuel Pumps. Mini Does NotMotoringFile · Motoring press · published 27 October 2010 · consulted 27 September 2026
  15. Renault Twingo (ab 1993): Schwachstellen laut TÜV-AuswertungAUTO BILD · Motoring press · published February 2002 · consulted 2 November 2026 · in German