The automobile industry in India is the eleventh largest in the world with an annual production of approximately 2 million units. India is expected to overtake China as the world's fastest growing car market in terms of the number of units sold and the automotive industry is one of the fastest growing manufacturing sectors in India. Because of its large market (India has a population of 1.1 billion; the second largest in the world), a low base of car ownership (7 per 1,000 people) and a surging economy, India has become a huge attraction for car manufacturers around the world.
Though several major foreign automakers, like Ford, GM and Honda, have their manufacturing bases in India, Indian automobile market is dominated by domestic companies. Maruti Suzuki is the largest passenger vehicle company, Tata Motors is the largest commercial vehicle company while Hero Honda is the largest motorcycle company in India. Other major Indian automobile manufacturers include Mahindra & Mahindra, Ashok Leyland and Bajaj Auto.
The automotive industry directly and indirectly employs 13 million individuals in India. The industry is valued at about US$ 35 billion contributing about 3.1% of India's GDP (nominal). India's cost-competitive auto components industry is the second largest in the world. In addition, India's motorcycle market is also the second largest in the world with annual sales of about 5 million units.
Source:- http://en.wikipedia.org/wiki/Automobile_industry_in_India