Motorbikes are generally more fuel-efficient than cars for several reasons: 1. Weight: Motorbikes are much lighter in weight compared to cars, which means they require less power to accelerate and maintain speed. This translates to better fuel efficiency. 2. Aerodynamics: Motorbikes have a more streamlined design compared to cars, which reduces air resistance and improves fuel efficiency. 3. Engine size: Motorbike engines are smaller and more efficient than car engines, requiring less fuel to operate.