Quiz: How does engine displacement affect a vehicle’s power and ef March 23, 2025 by Alex Turner How does engine displacement affect a vehicle’s power and efficiency? Discover more about Vehicle Engine and Automobile at our home page. A) Higher engine displacement generally increases power output but may decrease fuel efficiency. B) Higher engine displacement always results in better fuel efficiency regardless of design. C) Engine displacement has no impact on a vehicle’s power or efficiency. D) Lower engine displacement guarantees higher power output with lower emissions. Submit Answer