Alfa Romeo2025–2026Technical specifications

Junior 1.2 Ibrida 145 Q4: Technical specifications

Workshop data for the 1.2-litre petrol (engine code HPY (EB2LTDH2)). Covers engine, fluids, brakes, service, torques and air conditioning: the figures to check before a job or a parts order.

Summary

Match the engine code (HPY (EB2LTDH2)) to the vehicle before ordering parts or applying these figures.

Vehicle specifications

Overview

Make: Alfa Romeo
Model: Junior
Years: 2025–2026
Fuel: Petrol
Engine code: HPY (EB2LTDH2)

Performance & efficiency

Power: 107 kW (145 hp)
Engine size: 1,199 cc
Cylinders: 3 · DOHC
Compression ratio: 11.5:1
Fuel system: Bosch

All 108 specifications below

Engine & identification

Vehicle identification

No. of cylinders Type	3/DOHC
Capacity (Fiscal) cc	1199
Compression ratio :1	11,5
Suitable for unleaded petrol	Yes
Minimum octane rating RON	95
Ignition system Make	Bosch
Ignition system Type	MG1CS051
Ignition system Description	Map-DI
Fuel system Make	Bosch
Fuel system Type	MG1CS051
Fuel system Description	MFI-s(d)
Air metering Type	MAP
Combined ignition and fuel ECM	Yes
Diagnostic socket	Yes

Ignition system

Ignition coil Make	Eldor
Ignition coil Type	79081002
Ignition coil supply voltage + with ballast V	12,0

Firing order

The firing order for the Alfa Romeo Junior 1.2 Ibrida 145 Q4 (2025–2026) is 1-3-2.

Firing order	1-3-2

Valve clearances

Valve clearances on the Alfa Romeo Junior 1.2 Ibrida 145 Q4 (2025–2026) are hydraulic — they self-adjust, so no manual clearance figure applies.

Valve clearance - INLET mm	Hydraulic
Valve clearance - EXHAUST mm	Hydraulic

Engine oil & fluids

Engine oil

See the reference table for the complete engine oil entries and their conditions.

Coolant

See the reference table for the complete coolant entries and their conditions.

Grades, filling conditions and capacities

Lubricants and capacities — complete reference
Engine oil options
Ambient temperature range	All temperatures
Engine oil grade SAE	0W-20 Synthetic
Engine oil classification OEM	FPW 9.55535/01
Engine oil classification API/ACEA	/C6
Engine with filter(s) litres	2.55-3.63
Other lubricants and capacities
Auto shift manual (ASM) transmission oil classification	Fiat 9.55550-HE3
Auto shift manual (ASM) transmission (drain & refill) litres	3.4-4.0
Checking transmission fluid level
Auto shift manual (ASM) transmission (dry fill) litres	4.5
Differential oil grade - rear SAE	75W Synthetic
Differential oil classification - rear	GL-4
Differential rear litres	0.7-0.73
Coolant Type	B715110
Coolant Colour	Violet
Cooling system - total capacity litres	7.3
View more information	—
Bleeding
Brake fluid Type	DOT 4 LV
Brake fluid classification	ISO Class 6
Brake fluid litres	0.81

Brakes & wear limits

Brake disc thickness

Brake discs on the Alfa Romeo Junior 1.2 Ibrida 145 Q4 (2025–2026) are replaced at a minimum thickness of 24,2 mm (ventilated) or 24,55 mm (ventilated) front and 10,2 mm or 10,55 mm rear.

Minimum disc thickness for replacement - ventilated Front	24,2 mm
Minimum disc thickness after refacing - ventilated Front	24,55 mm
Minimum disc thickness for replacement Rear	10,2 mm
Minimum disc thickness after refacing Rear	10,55 mm

Service & electrical

Ignition timing

The ignition timing on the Alfa Romeo Junior 1.2 Ibrida 145 Q4 (2025–2026) is not adjustable.

Ignition timing - basic BTDC °Engine/rpm	Not adjustable

Tuning and emissions

Ignition advance checks °Engine/rpm	ECM Controlled
Idle speed rpm	Not adjustable
Oil temperature °C	80
CO level at idle speed - tailpipe Vol. % CO	Not adjustable
Lambda at increased idle λ	0,97-1,03

Starting and charging

Battery V/RC(Ah)	12

Service checks and adjustments

Use diagnostic equipment to check oil pressure.
Compression pressure bar	8,7-12,3
Oil pressure bar/rpm	—
Radiator cap bar	1,40
Thermostat opens °C	85-105

Fuel system

Fuel feed/lift pump delivery pressure bar	4,8-5,2
Fuel main pump delivery pressure bar	350 Max
Engine coolant temperature (ECT) sensor Ohm/°C	624-632/80
Injector Ohm	1,7-1,9
Lambda sensor (Oxygen) heater Ohm	2,8-4,5
Throttle motor Ohm	1,3-1,9

Spark plugs

Spark plugs Original equipment	Fiat
Spark plug Type	9863013680

Tightening torques

Cylinder head
Cylinder head instructions	—
Renew bolts	Yes
Other engine tightening torques
Main bearings Renew bolts/nuts	Yes
Main bearings Stage 1	20 Nm
Main bearings Stage 2	150°
Big end bearings Renew bolts/nuts	Yes
Big end bearings Stage 1	5 Nm
Big end bearings Stage 2	15 Nm+115°
Oil pump to cylinder block	10 Nm
Sump bolts	—
View more information	—
Excess sealant can cause engine damage.
Sump drain bolt	30 Nm
Flywheel/driveplate	1)8 Nm 2)30 Nm+90°/-
Crankshaft pulley/damper centre bolt	50 Nm+190°
Crankshaft pulley/damper bolts	1)15 Nm 2)20 Nm+60°±5°
Camshaft sprocket/gear	32 Nm+30°
Camshaft carrier/cap	1)5 Nm 2)10 Nm
Camshaft/rocker cover	—
View more information	—
Upper camshaft cover
Inlet manifold to cylinder head	—
Inlet manifold to cylinder head
Exhaust manifold to cylinder head	30 Nm
Exhaust downpipe to manifold	25 Nm
Water pump	8 Nm
Spark plugs	23 Nm
Fuel rail	20 Nm
Crankshaft position (CKP) sensor/engine speed (RPM) sensor	6 Nm
Camshaft position (CMP) sensor	8 Nm
Lambda sensor (Oxygen)	50 Nm
Knock sensor (KS)	20 Nm
Engine oil pressure switch	22 Nm
Oil filter	20 Nm
Chassis tightening torques
Front hub	285 Nm
Rear hub	285±18 Nm
Rear hub - wheel bearing housing bolts	115 Nm
Steering wheel	35 Nm
Steering rack/box mounting	80 Nm
Steering track rod end	50±5 Nm
Brake disc to hub Front	10 Nm
Brake caliper to carrier Front	30 Nm
Brake caliper/carrier to hub Front	105 Nm
Brake disc to hub Rear	10 Nm
Brake caliper to carrier Rear	34,5 Nm
Brake caliper/carrier to hub Rear	100 Nm
ABS sensor Front	8 Nm
ABS sensor Rear	8 Nm
Road wheels	115±11 Nm

Air conditioning

No. of AC service connectors	2
Air conditioning restrictor type	Expansion valve
Compressor clutch/magnetic coupling	No
Compressor variable displacement solenoid	No
Air conditioning refrigerant Type	R1234yf
Air conditioning refrigerant quantity grams	465±15
Air conditioning oil group	PAG
Air conditioning oil Type	ND-12
Air conditioning oil quantity cm³	110

Frequently asked questions

What is the firing order of the Alfa Romeo Junior 1.2 Ibrida 145 Q4?

The firing order for the Alfa Romeo Junior 1.2 Ibrida 145 Q4 (2025–2026) is 1-3-2.

How much oil does the Alfa Romeo Junior 1.2 Ibrida 145 Q4 take?

See the reference table for the complete engine oil entries and their conditions.

What are the valve clearances for the Alfa Romeo Junior 1.2 Ibrida 145 Q4?

Valve clearances on the Alfa Romeo Junior 1.2 Ibrida 145 Q4 (2025–2026) are hydraulic — they self-adjust, so no manual clearance figure applies.

What is the ignition timing for the Alfa Romeo Junior 1.2 Ibrida 145 Q4?

The ignition timing on the Alfa Romeo Junior 1.2 Ibrida 145 Q4 (2025–2026) is not adjustable.

What is the minimum brake disc thickness for the Alfa Romeo Junior 1.2 Ibrida 145 Q4?

Brake discs on the Alfa Romeo Junior 1.2 Ibrida 145 Q4 (2025–2026) are replaced at a minimum thickness of 24,2 mm (ventilated) or 24,55 mm (ventilated) front and 10,2 mm or 10,55 mm rear.