Skip to content
MotorFiable

1.0, 1.2 and 1.4 Fire vs 2.3 EcoBoost: which engine is more reliable?

According to our risk index, the 1.0, 1.2 and 1.4 Fire carries less risk than the 2.3 EcoBoost: 20/100 (low risk) versus 41/100 (moderate risk). The 1.0, 1.2 and 1.4 Fire has no documented serious faults; the 2.3 EcoBoost has 2 documented serious faults, the main one being «Focus RS cylinder head gasket and block: coolant entering the cylinders».

Risk index

1.0, 1.2 and 1.4 Fire

20

Low risk · 0 serious faults

Lower risk

Risk index

2.3 EcoBoost

41

Moderate risk · 2 serious faults

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

25 sourcesHow we work

Is the 1.0, 1.2 and 1.4 Fire reliable?

The 1.2 8v Fire is one of Fiat's simplest and most widespread petrol engines, with more than two decades in production and no serious or systemic faults documented. The sources consulted describe it as robust: its most-cited issues are isolated sensor failures (lambda sensor, crankshaft sensor), the ignition coil and somewhat high oil consumption at higher mileages; there is no pattern of timing belt breakage.[1][2][3][4][5][6]

See the 4 of the 1.0, 1.2 and 1.4 Fire faults

Is the 2.3 EcoBoost reliable?

The 2.3 EcoBoost is the turbocharged four-cylinder petrol engine that Ford has fitted since 2015 to the Focus RS (350 hp), the fourth-generation Focus ST (280 hp) and the Ranger. Its documented fault is the cylinder head gasket on Focus RS cars built up to July 2017, which Ford repaired free of charge. We have found no evidence that it affects the ST, which uses a variant derived from the Mustang.[7][8][9][10]

See the 3 of the 2.3 EcoBoost faults

Side-by-side comparison

Comparison of 1.0, 1.2 and 1.4 Fire and 2.3 EcoBoost
1.0, 1.2 and 1.4 Fire2.3 EcoBoost
Technical data
TypeEngineEngine
FuelPetrolPetrol
Displacement1,242 cm³2,261 cm³
TimingTiming belt (dry)Chain
Power60–69 hp270–350 hp
Productionsince 1985[11][12][13][14]since 2015[7][10][15][16]
Reliability
Risk index (what is it?)20Low risk41Moderate risk
Documented faults43
Of high or critical severity02
Worst severityMedium severityCritical severity
Main faults
  1. Medium severity: Sensor failures: lambda sensor and crankshaft position sensor (TDC)
  2. Low severity: Oil consumption or leak, in one case from the rocker cover gasket
  3. Low severity: Faulty ignition coil (misfire, engine warning light)
  1. Critical severity: Focus RS cylinder head gasket and block: coolant entering the cylinders
  2. High severity: Engine wiring harness damaged by the gearbox housing (fourth-generation Focus)
  3. Medium severity: Oil leaks from the filler cap, the oil cooler and the sump
Most expensive documented repairNo reliable dataNo reliable data
Which versions to buy
BuyRecommended versions
  • 1.2 8v SMPI 60-65 hp (1999-2009)[1]
  • 1.2 8v VVT 69 hp (2007-2020)[2][3][5][6]
  • 1.0, 1.3 and 1.4 8V Fire flex (Brazil, 2001-2017)[17]
  • 0.8 and 1.0 8V FIRE 34-50 hp (Panda, 1986-1994)[18]
  • 2.3 EcoBoost 280 hp (Focus ST, 2019-2025)[10][19]
With cautionVersions to be cautious about
  • 1.0 and 1.1 8V FIRE (European Uno, 1985-1994)[20]
  • 1.0 and 1.4 8V Fire Evo flex (Brazil, 2010-2021)[21]
  • 1.1 8V SPI/MPI 50-55 hp (1991-2010)[22][23]
  • 1.2 8V SPI/MPI 60-73 hp (1993-1999)[22]
  • 1.2 16V Fire 80 hp (Fiat Idea, 2004-2010)[24]
  • 1.4 8V Fire 77-78 hp (Fiat Idea, 2005-2011)[24]
  • 1.4 16V 95 hp (Fiat Idea, 2004-2010)[24]
  • 2.3 EcoBoost 350 hp (Focus RS, 2016-2018)[8][9]
  • 2.3 EcoBoost 270 hp (Ranger T6.2, Mexico, from 2023)[16]
  • 2.3 EcoBoost PHEV 281 hp (Ranger plug-in hybrid, from 2025)[16][25]
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 1.0, 1.2 and 1.4 Fire

With the 2.3 EcoBoost

Compare other engines

That is the comparison you are viewing: change one of the two engines.

Sources

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

  1. Fiabilité et pannes de la Fiat Panda (2003-2012)Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
  2. Fiabilité et pannes de la Fiat Panda (depuis 2012)Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
  3. Fiabilité et pannes de la Fiat 500Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
  4. Fiabilité et pannes de la Fiat Punto (Grande Punto / Punto Evo / Punto)Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
  5. Fiat Panda III (seit 2011) – Probleme & SchwachstellenGebrauchtwagenberater.de · Motoring press · published 21 January 2023 · consulted 27 September 2026 · in German
  6. Fiat 500 (ab 2007) – alle bekannten Probleme & KrankheitenGebrauchtwagenberater.de · Motoring press · published 24 November 2023 · consulted 27 September 2026 · in German
  7. Ford EcoBoost engineWikipedia · Other source · consulted 2 November 2026
  8. Ford Focus RS (Mk3) | PH Used Buying GuidePistonHeads · Motoring press · consulted 2 November 2026
  9. Ford Focus RS engine problems: owners promised free repairsevo · Motoring press · published 23 January 2018 · consulted 2 November 2026
  10. Ford Focus ST (Mk4) | PH Used Buying GuidePistonHeads · Motoring press · published 19 November 2023 · consulted 2 November 2026
  11. Fiat FIRE engineWikipedia (inglés) · Other source · consulted 27 September 2026
  12. Fiat 500 (2007)Wikipedia (inglés) · Other source · consulted 27 September 2026
  13. Fiat Grande PuntoWikipedia (inglés) · Other source · consulted 27 September 2026
  14. Ford KaWikipedia (inglés) · Other source · consulted 27 September 2026
  15. Ford Focus RS (tabla del Focus RS Mk3, 2015-2018)Wikipedia · Other source · consulted 2 November 2026 · in German
  16. Ford Ranger (T6)Wikipedia · Other source · consulted 2 November 2026
  17. Fiat Palio: 10 dicas pra observar na hora de comprar um usadoVrum · Motoring press · published 14 June 2022 · consulted 2 November 2026 · in Portuguese
  18. Fiabilité et pannes de la Fiat Panda (1980-2003): témoignages de propriétairesFiches-auto.fr · Owners' forum · consulted 2 November 2026 · in French
  19. Used Ford Focus ST (Mk4, 2019 to date) review and buyer's guideevo · Motoring press · published 4 August 2022 · consulted 2 November 2026
  20. Fiat UnoWikipedia (en) · Other source · consulted 2 November 2026
  21. Fiat Uno custa pouco, mas acumula queixas dos donos do hatchAutoo · Motoring press · published 27 June 2026 · consulted 2 November 2026 · in Portuguese
  22. Fiabilité et pannes de la Fiat Punto (1993-1999): témoignages de propriétairesFiches-auto.fr · Owners' forum · consulted 2 November 2026 · in French
  23. Fiat Seicento: typowe usterki (opiniones de propietarios)Autocentrum.pl · Owners' forum · consulted 2 November 2026 · in another language
  24. DVSA: base de datos de llamadas a revisión de vehículos desde 1992 (Fiat Idea: R/2007/012)DVSA (Reino Unido) · Official body · consulted 2 November 2026
  25. Ford Ranger (tabla del Ranger Plug-in-Hybrid)Wikipedia · Other source · consulted 2 November 2026 · in German