Complex sentence: Such changes include a change from the Rover V8 from the past, to a Ford V6, making the car more economical and better for the environment, as well as making the car cheaper to run in the long term.
Split into simpler sentences: Such changes include a change from the V8 from the past, to a Ford derived V6. Making the car more economical and better for the environment, as well as making the car cheaper to run in the long term.