Visitors look at a Tata Nano, the world's cheapest car, during the 10th Auto Expo in New Delhi yesterday. Global car manufacturers eyeing the explosive growth of the Indian market unveiled new compact models at the Delhi auto show in a bid to break the dominance of entrenched local producers. Japanese groups Toyota and Honda, Germany's Volkswagen and US giant General Motors unveiled new models specially designed for the growing car-buying middle classes and the country's notoriously bad roads.