Fuel Efficiency With its compact design and efficient use of turbocharging, the 1. L GM engine is known for excellent fuel economy. In many models, it achieves around 30-40 miles per gallon on the highway, making it a great choice for commuters and anyone looking to save on fuel costs. Fuel Efficiency With its compact design and efficient use of turbocharging, the 1. L GM engine is known for excellent fuel economy.Both engines have the same mileage but turbo petrol’s performance is more powerful. A turbocharged engine can give up to 20% improved fuel economy. It also gives better performance at high altitude. At high altitudes regular engines produce much less power due to the higher air pressure. On the other hand, at high altitudes, turbocharged engine performance and power generation improve.Increasing the size of the turbo will allow for an increase in power output at the cost of putting more stress on the engine and possibly shortening its lifespan. Learn how turbochargers work, the types you can find, the pros and cons, and more.The cons of a turbocharged car engine One of the biggest drawbacks is that these engines can be more expensive to maintain than their non-turbocharged counterparts. Additionally, turbocharged engines can be more difficult to start in cold weather, and they may also require more frequent tune-ups.With great fuel economy, having a 1. L engine means you won’t need to visit a petrol station as often. If you are usually making smaller trips but occasionally heading up the motorway, these might be the engine type for you! 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.Litre Engines They’re still usually good on the fuel economy front, so you won’t have to pay too many visits to the petrol station if you mainly drive around town. The 1. L engine offers better fuel efficiency, making it ideal for city driving. The 1. L engine delivers more power and acceleration, suited for highways and heavier loads. The choice depends on driving habits, performance needs, and fuel costs.