Who makes the lightest 4 cylinder engine?

As of my last update, the lightest four-cylinder engine is typically produced by manufacturers focused on compact and lightweight designs, such as motorcycle engine manufacturers or specialized automotive companies. For example, the engines used in many small motorcycles, like those from Honda or Yamaha, can be extremely lightweight. In the automotive sector, manufacturers like Suzuki and Toyota have developed compact four-cylinder engines that emphasize weight reduction. However, specific rankings can vary based on new releases and technological advancements.