Alfa Romeo 1.6 TS
Later version of the 1.6-litre Twin Spark with 120 hp and optimised fuelling. Like all Twin Spark engines fitted with two spark plugs per cylinder, improving response in the upper rev range. More willing to rev than comparable competitors, but not a torque hero: the power only really comes in above 4,000 rpm. Phaser issues and timing belt interval as for the AR37203. A long-lived engine with good maintenance — regular oil changes and timely belt service are rewarded.
Crisp Compact Sports Car with Soul
88 kW in the agile 147 body — the steering communicates wonderfully, the chassis invites corner carving. Typically Alfa: feeling beats the stopwatch.
Engine Weaknesses 8
Alfa originally recommended 120,000 km and shortened the interval several times down to 60,000 km or 5 years. Exceeding the interval risks engine damage through piston-to-valve contact.
Symptoms: No warning — engine suddenly refuses to start or makes a loud crack
The O-rings of the oil galleries between head and block (perbunan) swell and deform when exposed to engine oil. Cylinder 4 is particularly affected: coolant enters the oil, visible as milky emulsion on the oil filler cap.
Symptoms: Milky residue on oil filler cap or dipstick, coolant consumption without external leak, white smoke from exhaust on a warm engine.
Insufficient oil supply (missed oil changes, oil loss) leads to con-rod bearing failure. The crankshaft then needs to be reground/polished. Repair costs €700–1,000 for machining plus bearings; severe damage requires engine replacement.
Symptoms: Loud knocking or hammering from engine (especially under load), oil pressure warning light, noticeable power loss.
The hydraulic camshaft phaser tends to wear and can stick, leading to rough running and power loss.
Symptoms: Rough running when cold, power loss, irregular throttle response
Thermostat fails to open reliably, coolant loss through a leaking water pump. The pump's plastic impeller can break and interrupt coolant circulation. Recommendation: always replace water pump during timing belt change.
Symptoms: Temperature gauge fluctuates or rises above 110 °C, coolant level drops without visible external leak, cooling fan runs unusually often.
From approx. 150,000 km the valve stem seals harden. Typical signs are 0.5–1 litre of oil consumption per 1,000 km and blue smoke on cold start.
Symptoms: Blue smoke on cold start, increased oil consumption
The throttle body potentiometer's contact tracks wear out and supply incorrect signals to the engine ECU. Result: unstable idle, poor throttle response. Cleaning helps; relearning via OBD is required.
Symptoms: Rough or fluctuating idle between 500–2,000 rpm, engine hunts after cold start, vehicle jerks on throttle lift-off.
Lambda sensors have a lifespan of approx. 100,000 km. A worn sensor delivers incorrect mixture control, the engine runs rich, and fuel consumption rises sharply. Often misdiagnosed as an ignition problem.
Symptoms: Significantly increased fuel consumption (15–20 l/100 km), rough idle, engine management light, fault code P0170/P0172 (mixture too rich).
Vehicle Weaknesses 11
The V6 3.2 ECU is heat-sensitive and can fail at high ambient temperatures. Engine cuts out suddenly and only restarts after 15–20 minutes of cooling. No fault code stored.
The stock differential in the GTA gearbox can break under load — a bevel gear detaches and punches through the bell housing. Often without warning. A Q2 limited-slip differential is the recommended upgrade.
Early 147 GTA models have 305 mm Brembo discs instead of 330 mm. Alfa upgraded them to 330 mm under warranty. Unupgraded vehicles are prone to brake fade during spirited driving.
Sill lower edges and wheel arches rust from stone chips and moisture ingress. Areas around the jacking points are particularly at risk, where the plastic trim traps moisture.
Joints, bushes and anti-roll bar drop links on the front axle wear above average. Renewal typically required every 100,000–150,000 km. Plan for a suspension refresh at higher mileage.
The 305 mm braking system on the GTA is undersized for the 250 hp and wears heavily. Brake discs and pads must be renewed significantly more often than on regular 147 variants.
Window regulators and central locking fail from moisture ingress and aging control units. Door handles break. Airbag connectors on the side airbags can come loose.
On the Alfa 147 the air conditioning seals age and cause permanent refrigerant loss. Engine oil leaks from the timing belt can spray onto the compressor and cause additional damage. Compressor replacement: 400–900 €.
The 147 heater stays cold or delivers only lukewarm air, especially at idle. A blocked heat exchanger or air pockets in the system are the usual cause. Blend flap motor faults (often failed bulbs in the climate control unit) are also possible.
The Alfa 147's duplex power steering lines are prone to leaks, causing knocking and heavy steering. A leaking right-hand power steering pressure hose is known. Part cost approximately 100 €, fitment 1.5 labour hours. Steering play is not adjustable.
The 147 interior produces cold-weather creaking from trim panels and seat springs. On cold winter start-ups, seats and door trims squeak and crack. A typical quality issue on vehicles over 8 years old.