1.4 T-Jet 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 T-Jet: 36/100 versus 48/100 (both moderate risk). The 1.4 T-Jet has 1 documented serious fault, the main one being «Premature turbocharger failure or wear»; the 1.2 8v has 1 documented serious fault, the main one being «Damaged cylinder head gasket (coolant loss and overheating)».
The index (0–100) weights the severity and frequency of the three most serious documented faults. How it is calculated
Is the 1.4 T-Jet reliable?
Fiat's 1.4 T-Jet/MultiAir powers a large part of the group's turbo petrol range (Fiat, Abarth, Alfa Romeo, Lancia, Jeep) from 2007 onwards. Several models have accumulated reports of turbocharger failure, MultiAir/UniAir unit faults and high oil consumption; by contrast, there is no documented pattern of timing belt failure.[1][2][3][4][5][6]
See the 4 of the 1.4 T-Jet faultsIs 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 faultsSide-by-side comparison
| Item | 1.4 T-Jet | 1.2 8v |
|---|---|---|
| Technical data | ||
| Type | Engine | Engine |
| Fuel | Petrol | Petrol |
| Displacement | 1,368 cm³ | 1,149 cm³ |
| Timing | Timing belt (dry) | Timing belt (dry) |
| Power | 105–205 hp | 54–60 hp |
| Production | 2007–2024[10][11][12][13] | 1996–2012[14][15][16][17] |
| Reliability | ||
| Risk index (what is it?) | 48Moderate risk | 36Moderate risk |
| Documented faults | 4 | 5 |
| Of high or critical severity | 1 | 1 |
| Worst severity | High severity | High severity |
| Main faults |
|
|
| Most expensive documented repair | up to €2,300Premature turbocharger failure or wearPublished figure[1][2] | No reliable data |
| Which versions to buy | ||
| BuyRecommended versions | None | None |
| With cautionVersions to be cautious about | ||
| 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
Other comparisons
With the 1.4 T-Jet
- 1.4 T-Jet vs 1.2 PureTech
- 1.4 T-Jet vs 1.0 PureTech
- 1.4 T-Jet vs 1.2 and 1.4 TSI
- 1.4 T-Jet vs 1.0 TSI / 1.5 TSI
- 1.4 T-Jet vs 1.2 TCe
- 1.4 T-Jet vs 1.0 EcoBoost
- 1.4 T-Jet vs 1.3 TCe
- 1.4 T-Jet vs 1.6 EcoBoost
- 1.4 T-Jet vs 2.0 TSI / TFSI
- 1.4 T-Jet vs Audi 3.0 TFSI V6
- 1.4 T-Jet vs 2.4, 2.8 and 3.0 V6 30v
- 1.4 T-Jet vs BMW B38 / B37
- 1.4 T-Jet vs BMW B48 / B38
- 1.4 T-Jet vs BMW B58
- 1.4 T-Jet vs M43 1.6, 1.8 and 1.9
- 1.4 T-Jet vs M50 and M52
- 1.4 T-Jet vs BMW M54
- 1.4 T-Jet vs BMW N13
- 1.4 T-Jet vs BMW N20
- 1.4 T-Jet vs N42 and N45 1.6, 1.8 and 2.0
- 1.4 T-Jet vs BMW N43/N46
- 1.4 T-Jet vs BMW N52 / N53
- 1.4 T-Jet vs BMW N54/N55
- 1.4 T-Jet vs BMW N62 / N63
- 1.4 T-Jet vs 1.0, 1.2 and 1.4 Fire
- 1.4 T-Jet vs 1.0 T3 and 1.3 T4 FireFly Turbo
- 1.4 T-Jet vs 0.9 TwinAir and 1.0/1.3 FireFly
- 1.4 T-Jet vs 1.5 EcoBoost
- 1.4 T-Jet vs 1.25/1.4/1.6 Ti-VCT
- 1.4 T-Jet vs 2.0 EcoBoost
- 1.4 T-Jet vs 2.3 EcoBoost
- 1.4 T-Jet vs 1.0-1.6 8v Endura-E, Duratec 8v and RoCam
- 1.4 T-Jet vs 1.8 and 2.0 Zetec-E
- 1.4 T-Jet vs 1.0 and 1.2 de 3 cilindros (Onix and Tracker)
- 1.4 T-Jet vs 1.4 / 1.6 16v E-TEC II
- 1.4 T-Jet vs 0.8 / 1.0 / 1.2 S-TEC
- 1.4 T-Jet vs 1.2, 1.4 and 1.6 8V (Family 1)
- 1.4 T-Jet vs Family II 2.0 and 2.4 gasolina
- 1.4 T-Jet vs 1.2 / 1.4 / 1.8 i-VTEC
- 1.4 T-Jet vs 1.0 / 1.5 VTEC Turbo
- 1.4 T-Jet vs 2.0 / 2.4 i-VTEC
- 1.4 T-Jet vs Honda e:HEV / i-MMD
- 1.4 T-Jet vs Honda IMA híbrido
- 1.4 T-Jet vs 1.0 T-GDI
- 1.4 T-Jet vs 1.6 GDI / T-GDI
- 1.4 T-Jet vs 1.6 GDi híbrido (Kappa)
- 1.4 T-Jet vs 1.3, 1.4 and 1.6 Alpha
- 1.4 T-Jet vs 1.8 / 2.0 Beta II
- 1.4 T-Jet vs 1.0 and 1.1 Epsilon
- 1.4 T-Jet vs 1.4 / 1.6 MPI Gamma
- 1.4 T-Jet vs 1.0 / 1.25 MPi
- 1.4 T-Jet vs 1.8 / 2.0 Nu
- 1.4 T-Jet vs Smartstream 1.6 T-GDi
- 1.4 T-Jet vs 2.0 / 2.4 GDI and T-GDI (Theta II)
- 1.4 T-Jet vs 2.0 and 3.0 Ingenium gasolina
- 1.4 T-Jet vs 2.3 MZR DISI Turbo
- 1.4 T-Jet vs MZR gasolina
- 1.4 T-Jet vs Skyactiv-G
- 1.4 T-Jet vs M111
- 1.4 T-Jet vs M112 / M113
- 1.4 T-Jet vs M264/M254
- 1.4 T-Jet vs M266 (1.5, 1.7, 2.0 and 2.0 Turbo)
- 1.4 T-Jet vs M260
- 1.4 T-Jet vs M271
- 1.4 T-Jet vs M272/M273
- 1.4 T-Jet vs M270/M274
- 1.4 T-Jet vs M276
- 1.4 T-Jet vs 1.5 VTi-TECH / T-GDI
- 1.4 T-Jet vs MIVEC gasolina
- 1.4 T-Jet vs Mitsubishi PHEV
- 1.4 T-Jet vs 1.6 DIG-T
- 1.4 T-Jet vs 1.5 VC-Turbo e-Power
- 1.4 T-Jet vs 1.2 HR12DE and 1.2 DIG-S (HR12DDR)
- 1.4 T-Jet vs 2.0 MR20DE / 2.5 QR25DE
- 1.4 T-Jet vs 1.5/1.6/1.8 QG
- 1.4 T-Jet vs 1.6 16v HR16DE / H4M
- 1.4 T-Jet vs 1.0/1.2/1.4 Ecotec
- 1.4 T-Jet vs 1.4 Turbo
- 1.4 T-Jet vs 1.6 and 1.8 Ecotec 16v
- 1.4 T-Jet vs 2.2 Ecotec gasolina
- 1.4 T-Jet vs Porsche MA1 / 9A1
- 1.4 T-Jet vs Porsche M96/M97
- 1.4 T-Jet vs Porsche V8 and V6 (Cayenne and Panamera)
- 1.4 T-Jet vs 1.4 and 1.6 TU3/TU5
- 1.4 T-Jet vs 1.4/1.6 VTi
- 1.4 T-Jet vs 1.6 THP
- 1.4 T-Jet vs 1.8, 2.0 and 2.2 16v EW7/EW10/EW12
- 1.4 T-Jet vs 1.8 and 2.0 XU
- 1.4 T-Jet vs 0.9 TCe
- 1.4 T-Jet vs 1.0 SCe (B4D)
- 1.4 T-Jet vs 1.0 TCe / SCe
- 1.4 T-Jet vs 1.4 and 1.6 8v
- 1.4 T-Jet vs 1.8 TCe
- 1.4 T-Jet vs 1.2 16v
- 1.4 T-Jet vs E-Tech Híbrido
- 1.4 T-Jet vs 2.0 16v F4R and F4RT
- 1.4 T-Jet vs 1.4 and 1.6 16v
- 1.4 T-Jet vs Rover K-Series
- 1.4 T-Jet vs 1.0 and 1.4 Boosterjet
- 1.4 T-Jet vs 1.2 Dualjet and 1.2 VVT
- 1.4 T-Jet vs 1.5 K15B (Jimny)
- 1.4 T-Jet vs 1.3, 1.5 and 1.6 gasolina (serie M)
- 1.4 T-Jet vs 1.0 VVT-i
- 1.4 T-Jet vs 1.2 Turbo
- 1.4 T-Jet vs 1.33 Dual VVT-i
- 1.4 T-Jet vs 1.4, 1.6 and 1.8 VVT-i
- 1.4 T-Jet vs 1.5 Hybrid
- 1.4 T-Jet vs 1.6 Dual VVT-i
- 1.4 T-Jet vs 1.8 Hybrid
- 1.4 T-Jet vs 2.7 and 4.0 gasolina (2TR-FE and 1GR-FE)
- 1.4 T-Jet vs 2.0 and 2.4 VVT-i
- 1.4 T-Jet vs 2.0 and 2.5 Hybrid
- 1.4 T-Jet vs Volvo 5 cilindros gasolina
- 1.4 T-Jet vs Drive-E gasolina
- 1.4 T-Jet vs 1.0 MPI
- 1.4 T-Jet vs 1.2 12V
- 1.4 T-Jet vs 1.4 16v and 1.6 FSI
- 1.4 T-Jet vs 1.8 T 20v
- 1.4 T-Jet vs 2.0 FSI
- 1.4 T-Jet vs VW 2.0 TFSI EA113
- 1.4 T-Jet vs 2.3 VR5 (V5)
- 1.4 T-Jet vs 1.0, 1.4 and 1.6 8v EA111
- 1.4 T-Jet vs 1.6 and 2.0 8v EA827
- 1.4 T-Jet vs VR6
With the 1.2 8v
- 1.2 8v vs 1.2 PureTech
- 1.2 8v vs 1.0 PureTech
- 1.2 8v vs 1.2 and 1.4 TSI
- 1.2 8v vs 1.0 TSI / 1.5 TSI
- 1.2 8v vs 1.2 TCe
- 1.2 8v vs 1.0 EcoBoost
- 1.2 8v vs 1.3 TCe
- 1.2 8v vs 1.6 EcoBoost
- 1.2 8v vs 2.0 TSI / TFSI
- 1.2 8v vs Audi 3.0 TFSI V6
- 1.2 8v vs 2.4, 2.8 and 3.0 V6 30v
- 1.2 8v vs BMW B38 / B37
- 1.2 8v vs BMW B48 / B38
- 1.2 8v vs BMW B58
- 1.2 8v vs M43 1.6, 1.8 and 1.9
- 1.2 8v vs M50 and M52
- 1.2 8v vs BMW M54
- 1.2 8v vs BMW N13
- 1.2 8v vs BMW N20
- 1.2 8v vs N42 and N45 1.6, 1.8 and 2.0
- 1.2 8v vs BMW N43/N46
- 1.2 8v vs BMW N52 / N53
- 1.2 8v vs BMW N54/N55
- 1.2 8v vs BMW N62 / N63
- 1.2 8v vs 1.0, 1.2 and 1.4 Fire
- 1.2 8v vs 1.0 T3 and 1.3 T4 FireFly Turbo
- 1.2 8v vs 0.9 TwinAir and 1.0/1.3 FireFly
- 1.2 8v vs 1.5 EcoBoost
- 1.2 8v vs 1.25/1.4/1.6 Ti-VCT
- 1.2 8v vs 2.0 EcoBoost
- 1.2 8v vs 2.3 EcoBoost
- 1.2 8v vs 1.0-1.6 8v Endura-E, Duratec 8v and RoCam
- 1.2 8v vs 1.8 and 2.0 Zetec-E
- 1.2 8v vs 1.0 and 1.2 de 3 cilindros (Onix and Tracker)
- 1.2 8v vs 1.4 / 1.6 16v E-TEC II
- 1.2 8v vs 0.8 / 1.0 / 1.2 S-TEC
- 1.2 8v vs 1.2, 1.4 and 1.6 8V (Family 1)
- 1.2 8v vs Family II 2.0 and 2.4 gasolina
- 1.2 8v vs 1.2 / 1.4 / 1.8 i-VTEC
- 1.2 8v vs 1.0 / 1.5 VTEC Turbo
- 1.2 8v vs 2.0 / 2.4 i-VTEC
- 1.2 8v vs Honda e:HEV / i-MMD
- 1.2 8v vs Honda IMA híbrido
- 1.2 8v vs 1.0 T-GDI
- 1.2 8v vs 1.6 GDI / T-GDI
- 1.2 8v vs 1.6 GDi híbrido (Kappa)
- 1.2 8v vs 1.3, 1.4 and 1.6 Alpha
- 1.2 8v vs 1.8 / 2.0 Beta II
- 1.2 8v vs 1.0 and 1.1 Epsilon
- 1.2 8v vs 1.4 / 1.6 MPI Gamma
- 1.2 8v vs 1.0 / 1.25 MPi
- 1.2 8v vs 1.8 / 2.0 Nu
- 1.2 8v vs Smartstream 1.6 T-GDi
- 1.2 8v vs 2.0 / 2.4 GDI and T-GDI (Theta II)
- 1.2 8v vs 2.0 and 3.0 Ingenium gasolina
- 1.2 8v vs 2.3 MZR DISI Turbo
- 1.2 8v vs MZR gasolina
- 1.2 8v vs Skyactiv-G
- 1.2 8v vs M111
- 1.2 8v vs M112 / M113
- 1.2 8v vs M264/M254
- 1.2 8v vs M266 (1.5, 1.7, 2.0 and 2.0 Turbo)
- 1.2 8v vs M260
- 1.2 8v vs M271
- 1.2 8v vs M272/M273
- 1.2 8v vs M270/M274
- 1.2 8v vs M276
- 1.2 8v vs 1.5 VTi-TECH / T-GDI
- 1.2 8v vs MIVEC gasolina
- 1.2 8v vs Mitsubishi PHEV
- 1.2 8v vs 1.6 DIG-T
- 1.2 8v vs 1.5 VC-Turbo e-Power
- 1.2 8v vs 1.2 HR12DE and 1.2 DIG-S (HR12DDR)
- 1.2 8v vs 2.0 MR20DE / 2.5 QR25DE
- 1.2 8v vs 1.5/1.6/1.8 QG
- 1.2 8v vs 1.6 16v HR16DE / H4M
- 1.2 8v vs 1.0/1.2/1.4 Ecotec
- 1.2 8v vs 1.4 Turbo
- 1.2 8v vs 1.6 and 1.8 Ecotec 16v
- 1.2 8v vs 2.2 Ecotec gasolina
- 1.2 8v vs Porsche MA1 / 9A1
- 1.2 8v vs Porsche M96/M97
- 1.2 8v vs Porsche V8 and V6 (Cayenne and Panamera)
- 1.2 8v vs 1.4 and 1.6 TU3/TU5
- 1.2 8v vs 1.4/1.6 VTi
- 1.2 8v vs 1.6 THP
- 1.2 8v vs 1.8, 2.0 and 2.2 16v EW7/EW10/EW12
- 1.2 8v vs 1.8 and 2.0 XU
- 1.2 8v vs 0.9 TCe
- 1.2 8v vs 1.0 SCe (B4D)
- 1.2 8v vs 1.0 TCe / SCe
- 1.2 8v vs 1.4 and 1.6 8v
- 1.2 8v vs 1.8 TCe
- 1.2 8v vs 1.2 16v
- 1.2 8v vs E-Tech Híbrido
- 1.2 8v vs 2.0 16v F4R and F4RT
- 1.2 8v vs 1.4 and 1.6 16v
- 1.2 8v vs Rover K-Series
- 1.2 8v vs 1.0 and 1.4 Boosterjet
- 1.2 8v vs 1.2 Dualjet and 1.2 VVT
- 1.2 8v vs 1.5 K15B (Jimny)
- 1.2 8v vs 1.3, 1.5 and 1.6 gasolina (serie M)
- 1.2 8v vs 1.0 VVT-i
- 1.2 8v vs 1.2 Turbo
- 1.2 8v vs 1.33 Dual VVT-i
- 1.2 8v vs 1.4, 1.6 and 1.8 VVT-i
- 1.2 8v vs 1.5 Hybrid
- 1.2 8v vs 1.6 Dual VVT-i
- 1.2 8v vs 1.8 Hybrid
- 1.2 8v vs 2.7 and 4.0 gasolina (2TR-FE and 1GR-FE)
- 1.2 8v vs 2.0 and 2.4 VVT-i
- 1.2 8v vs 2.0 and 2.5 Hybrid
- 1.2 8v vs Volvo 5 cilindros gasolina
- 1.2 8v vs Drive-E gasolina
- 1.2 8v vs 1.0 MPI
- 1.2 8v vs 1.2 12V
- 1.2 8v vs 1.4 16v and 1.6 FSI
- 1.2 8v vs 1.8 T 20v
- 1.2 8v vs 2.0 FSI
- 1.2 8v vs VW 2.0 TFSI EA113
- 1.2 8v vs 2.3 VR5 (V5)
- 1.2 8v vs 1.0, 1.4 and 1.6 8v EA111
- 1.2 8v vs 1.6 and 2.0 8v EA827
- 1.2 8v vs VR6
Compare other engines
Sources
Every fact on this page links to its source. If you find an error, let us know.
- Fiat 500X : les plus et les moinsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
- Fiat 500X : fiabilité, pannes et rappelsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
- Alfa Romeo MiTo : les plus et les moinsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
- Alfa Romeo MiTo : fiabilité, pannes et rappelsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
- Alfa Romeo Giulietta : les plus et les moinsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
- Fiat Tipo : les plus et les moinsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
- 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
- Motor T-JetWikipedia (español) · Other source · consulted 27 September 2026 · in Spanish
- Fiat FIRE engineWikipedia (inglés) · Other source · consulted 27 September 2026
- MultiAirWikipedia (inglés) · Other source · consulted 27 September 2026
- Motor FIREWikipedia (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
- Fiat Bravo (2007-2014) : les plus et les moinsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
- Fiat 500 (2007) : les plus et les moinsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
- Jeep Renegade : les plus et les moinsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
- Jeep Compass : les plus et les moinsFiches-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