Alfa Romeo 1.9 JTD 16V
The 1.9-litre JTD 16V with 150 hp is the stronger version of Alfa's diesel — 16 valves instead of 8 deliver more power and a slightly more refined character. 305 Nm of torque make it a capable daily driver. Turbo and injectors are wear items at high mileage. DPF regeneration is problematic with mainly short-trip use. For long-distance and motorway driving, the most sensible Alfa diesel of its era.
140 hp diesel with bite
The 1.9 JTD 16V with 140 hp turns the 147 into a quick diesel hatchback. Strong pull, direct chassis — that's diesel fun the Alfa way.
Engine Weaknesses 5
The rubber O-ring on the oil pump suction pipe loses its elasticity from around 80,000 km, allowing air into the pump. Initially only noticeable on cold starts; in extreme cases an oil pressure drop can lead to engine damage.
Symptoms: Oil pressure warning shortly after start, faint ticking on cold start, rarely engine warning light
The VTG turbocharger clogs up with soot and rust. The adjustment ring jams, leading to power loss and unstable boost pressure.
Symptoms: Power loss, fluctuating boost pressure, engine warning light
The gasket between the vacuum pump and cylinder head as well as the square O-ring on the pump housing begin to leak over time. Oil drops on the manifold cause smoke and an unpleasant smell inside the cabin.
Symptoms: Oil smell in the cabin, blue oily smoke after switching off, visible oil traces on the cylinder head
The plastic cover of the EGR heat exchanger behind the cylinder head cracks or no longer seals properly. Coolant loss and overheating risk are possible consequences; replacing the gasket set is labour-intensive.
Symptoms: Slow coolant loss, coolant smell in the engine bay, sporadic overtemperature warning light
The EGR valve carbons up regularly during short-trip use. Causes power loss and fault codes.
Symptoms: Power loss, limp mode, engine warning light
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.