I believe J D Power conducts several different types of surveys and publishes ratings for each, for a given market, every year.
For the USA : have a look at
JDPower.com | Ratings: New & Used Cars
Ratings: New and Used Cars
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[FONT=Arial,Helvetica,sans-serif]Power Circle Ratings are your guide to finding which vehicles ranked highest in J.D. Power and Associates consumer surveys. All Power Circle Ratings are based on the opinions of a sample of consumers who have used or owned the product or service being rated and are therefore indicative of a typical buying experience.[/FONT]
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Quality Ratings
Performance & Design Ratings

Captures owner delight with the performance and design of their new vehicles.

Highlights initial quality and feature functionality of new vehicles.
Dependability Ratings
Green Efficiency Ratings

Rates vehicle makes based on fuel economy, air pollution and greenhouse gases.

Measures problems experienced by original owners of 3-year-old vehicles.
Safety Ratings
Ratings By Model

View all available ratings of a particular model.
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View the safety ratings of a particular model.
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Additional Ratings
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For India, I believe there are 3 important ones, in addition to others
Worldwide Services: India | J.D. Power and Associates :
IQS : initial quality of vehicle
SSI : sales satisfaction index - rates your buying experience
CSI : customer satisfaction index - rates your customer service experience, after the sale.
You are a better consumer if you are well informed.
Cheers,
FourWheelDrift