Santro and chevy are the same thing technology wise. Santro has a 1 litre engine but chevy will also be soon introduced with a 1 litre engine but the kind of traffic we have, I think the 0.8 litre is enough. The main thing is that chevy is foreign assembled and is very very strong. I have seen both chevy and santro after accidents and believe me, the santros were totally smashed whereas chevys were in quite good shape. So I would recommend that you buy a chevy but if you want only fast acceleration, then go for santro as it's body is also light as it's made of tin.