Alfa Romeo AR32405 2.5L V6 petrol engine for sale

Alfa Romeo AR32405 2.5L 24V V6 petrol engine

Celebrated and responsiveness and track-ready performance.

The Alfa Romeo AR32405 2.5L V6 petrol engine is one of the most celebrated power plants from Alfa’s legendary Busso V6 family, renowned for its smooth performance, distinctive exhaust note, and timeless engineering. 

If you’re searching for a reliable replacement Alfa Romeo V6 engine for sale, the AR32405 offers an impressive blend of power, responsiveness, and durability, making it a top choice for enthusiasts restoring or maintaining classic Alfa models. 

This 2.5-liter naturally aspirated engine uses a refined 24-valve DOHC layout that delivers excellent breathing efficiency, strong mid-range torque, and sharp throttle response—characteristics that made it one of the most respected Italian engines of its era.

 Specifications, Common weaknesses and Maintenance.

The AR32405 engine is commonly found in models such as the Alfa Romeo 156 2.5 V6 24V, Alfa Romeo 166 2.5 V6, and earlier Alfa Romeo GTV 2.5 V6 variants. Its compatibility extends across multiple Alfa Romeo platforms that were designed to house the iconic Busso V6, making it an ideal direct replacement for owners refurbishing or upgrading these vehicles. 

This engine produces around 141–140 kW (190 HP) with torque figures close to 222 Nm, supported by multi-point fuel injection, an alloy block and heads, and variable intake geometry that enhances performance across different RPM ranges.

The AR32405 is best for its reliability, but also there are a few common weaknesses to be aware of. One known issue involves timing belt wear; although strong, the belt requires strict replacement intervals to prevent costly engine damage. Cooling system components, such as thermostats and radiators, may gradually deteriorate with age, so regular inspection is essential. 

Oil leaks from cam covers and aging rubber seals are also common in high-mileage units but are easy to address during routine maintenance. Additionally, the V6’s spirited nature means worn ignition coils or sensors may affect performance if not replaced on schedule.

With proper servicing—especially timely belt changes, quality lubricants, and attentive cooling system care—the Alfa Romeo AR32405 2.5L V6 petrol engine remains exceptionally durable and rewarding to drive. This engine for sale is an excellent option for Alfa enthusiasts seeking authentic performance, smooth refinement, and the unmistakable character of the famed Busso V6.