Alfa Romeo 147 AR32104 1.6L petrol engine for sale.

Alfa Romeo 147 AR32104 1.6L Twin Spark 16V petrol engine

Smooth revving and fuel-efficient power plant.

The Alfa Romeo 147 AR32104 1.6L petrol engine is a well-known power unit admired for its lively throttle response, smooth revving nature, and signature Alfa Romeo character. This engine is engineered with Alfa’s iconic Twin Spark technology, featuring dual spark plugs per cylinder to enhance combustion efficiency, improve fuel economy, and deliver a spirited driving experience. 

If you’re looking for a reliable replacement engine that blends performance with unmistakable Italian refinement, the AR32104 is an excellent option for both restoration and everyday driving needs.

This 1.6L inline-four engine was most prominently used in the Alfa Romeo 147, but it is also compatible with several other Alfa Romeo platforms that use the same generation of Twin Spark architecture.

Some compatible and cross-fitment examples include the Alfa Romeo 156 1.6 Twin Spark, Alfa Romeo GT 1.6, and certain European-spec Alfa Romeo 145/146 1.6 models. 

This makes the AR32104 variant a versatile and widely supported engine for customers looking to revive their vehicle without costly modifications.

Specifications, Common weaknesses and Maintenance.

In terms of specifications, the AR32104 1.6 Twin Spark features a 1598cc displacement, 16-valve DOHC aluminum cylinder head, multipoint fuel injection, and a power output that typically ranges between 88–88 kW (118–120 hp)depending on the model variant and ECU calibration. 

The engine’s lightweight design, variable intake system, and twin ignition layout collectively enhance torque delivery across the rev range while maintaining smooth and efficient operation. This makes the engine enjoyable for both city driving and highway cruising, offering a balanced mix of economy and performance.

Like all Twin Spark engines, there are known common weaknesses that owners should be aware of. The AR32104 is sensitive to irregular maintenance, particularly when it comes to timing belt changes, which must be done every 60,000–70,000 km to avoid valve damage. Oil consumption can be higher than average, and regular top-ups with high-quality lubricants are recommended.

 Coil pack failures and worn variators (responsible for cam phasing) may also develop over time, leading to rough idle or reduced low-end torque. However, with proper servicing, timely belt replacements, and consistent oil checks, the Alfa Romeo 147 AR32104 1.6L petrol engine remains durable, engaging, and highly rewarding to drive, making it a valuable and dependable engine replacement option.