How does the Maruti Suzuki WagonR's fuel efficiency compare to other cars in its class, and what features contribute to its efficiency?

The Maruti Suzuki Wagon R's fuel efficiency is one of its biggest strengths, with the car offering an impressive mileage of up to 21.79 km/l (as per ARAI certification). The car's efficiency is due to a range of factors, including its lightweight construction, aerodynamic design, and smart engine management systems.