Actors pose with the newly launched Datsun Go today in New Delhi, India, where Nissan has reintroduced the nameplate after more than three decades.

NEW DELHI — Nissan launched a new Datsun in India today, three decades after shelving the brand that helped win Western acceptance of Japanese autos. The company hopes that bringing back the brand that built its U.S. business will fuel growth in emerging markets with a new generation of buyers.

The new Datsun — a five-seat hatchback — will go on sale in India next year for under 400,000 rupees (about $6,670). It will also be sold in Indonesia and Russia, with the company saying its offerings will be tailored to each market in terms of price and size.

In India, the English-language promotional website for the car describes it as the “badge of the risers,” an appeal to aspirational first-time auto buyers.

Nissan is hoping the comeback of one of its defining brands will herald the same rapid expansion that the Datsun provided when it hit American showrooms. The Datsun was discontinued globally starting in 1981 to unify the model lineup under the Nissan brand. Nissan also makes Infiniti models.

Faced with stagnating sales in established markets, most global automakers have their eyes on fast-growing countries that also include China, Mexico and Brazil.

India’s population of 1.2 billion is a lure for automakers hoping to ring up big sales, albeit with cheaper prices and lower profit margins. Datsun enters the Indian market at a tough time. Sales of passenger cars fell by 10 percent in the April-June quarter from the previous year.