Maruti Alto 800 or Renault KWID or the Hyundai Sentro which car should you choose? Compare the three models to determine which one is best for you based on their price, size, space, boot space, service cost, mileage, features, colours, and other specifications. The starting price for the Maruti Alto 800 STD Opt (Petrol) is Rs. 3.39 lakh, and the starting price for the Renault KWID RXL is Rs. 4.64 lakh ex-showroom (Petrol) where as Hyundai Santro price starts at Rs 4.90 Lakh ex-showroom for Era Executive (Petrol). The top model of the Alto 800 has a 796 cc CNG engine, while the top model of the KWID has a 999 cc Petrol engine and Santro has 1086 cc (Petrol top model) engine. In terms of mileage, the KWID has a mileage of 22.25 kmpl (Petrol top model) while the Alto 800 has a mileage of 31.59 km/kg (Petrol top model) where as the Santro has a mileage of 30.48 km/kg (Petrol top model).