Alfa Romeo engines are known for their performance-oriented design and spirited driving experience, but longevity depends heavily on maintenance and driving habits. On average, a well-maintained Alfa Romeo engine can last between 150,000 to 200,000 miles. Regular oil changes, timely belt replacements, and using manufacturer-recommended fluids are critical to extending engine life. Models like the Giulia and Stelvio have shown reasonable reliability when properly serviced. Neglecting routine maintenance, however, can significantly shorten the lifespan. Overall, Alfa Romeo engines reward careful owners with solid performance and durability over time.