New Delhi, Feb 04 (ANI): Tata Motors unveiled its first new models in four years, banking on two small cars to reverse the company's sliding passenger car sales in the face of growing foreign competition. In a bid to revive its fortunes, Tata is pinning its hopes for now on the all-new Bolt hatchback and Zest entry-level sedan to tap into the small car market that accounts for the bulk of passenger vehicle sales in India. Sales of Tata passenger vehicles in India fell an annual 37 percent in the first nine months of the fiscal year that ends in March, according to data from Society of Indian Automobile Manufacturers (SIAM).