What is a major advantage of using an aluminum engine block over a cast iron block?

The primary advantage of using an aluminum engine block over a cast iron block lies in its lighter weight, which contributes to improved fuel efficiency. Aluminum is significantly lighter than cast iron, leading to a reduction in the overall weight of the engine. This reduction can result in enhanced vehicle performance and better fuel economy, as less weight generally means that the engine does not need to work as hard to propel the vehicle. Consequently, the engine can operate more efficiently, leading to savings in fuel consumption and reduced emissions.

The lightweight nature of aluminum also facilitates easier handling and installation during the manufacturing and service processes. Moreover, using a lighter engine contributes to lower center of gravity and improved handling characteristics of the vehicle.