If you’d prefer a little more power underneath you, or you do a mixture of short journeys and trips along the motorway, you might find that an engine between 1. Engines between 1. With great fuel economy, having a 1. L engine means you won’t need to visit a petrol station as often.When comparing a 1. L engine to a 2. L engine, the primary difference lies in their displacement, which affects power output and fuel efficiency. The 1. L engine, being smaller, is generally more fuel-efficient and economical, making it ideal for daily commuting and city driving. These engines provide more power and better performance than 1. You’ll typically find these in larger family hatchbacks, supermini cars and medium-sized SUVs. They do use more fuel but still tend to be quite economical.