Jaguar will launch new entry level models likely to be all-aluminum, according to media reports.

The range will include a compact sedan, a wagon and a crossover SUV, the Financial Times reported today. "This is a massive leap forward for Jaguar. It's the big investment that the brand desperately needs," the paper quoted a source as saying.

The new cars will go on sale in the second half of 2015, Reuters also reported today, citing sources close to the company.

The Jaguars would rival cars such as the BMW 3 series and Mercedes C class.

"It's a logical idea to use the momentum from Land Rover and expand the Jaguar range," said IHS Automotive research director Christoph Stuermer. "Jaguar is less than half the size of Land Rover so they need to do something, plus investors will like a move downscale."

The cheaper versions of Land Rover's Evoque small SUV and Freelander are currently among Jaguar Land Rover's top-selling models.

The new Jaguars will be built on production lines previously used to make Land Rover vehicles which are currently being modified at Jaguar Land Rover's plant in Solihull, central England, one of the Reuters sources said.

The range is likely to have an all-aluminum construction as used for the recent Jaguar XJ model. Jaguar Land Rover last year signed a deal with a Saudi Arabian firm to buy aluminum from one of the world's largest aluminum smelters.

Jaguar Land Rover said earlier this year it planned to invest 2.75 billion pounds ($4.23 billion) each year for the next four years on new products and production facilities.

Jaguar Land Rover has roared to health in the four years since India's Tata Motors bought the group from Ford Motor Co. for $2.3 billion, helped by the growing demand for luxury cars in emerging markets which has helped the automaker buck the trend of plant shutdowns and falling production at many European automakers.

Sales at JLR rose 14 percent in the first half of 2013 to 210,190 cars, helped by fast-growing China -- but less than 20 percent of them came from Jaguar.

Now the Tata bosses are keen to bring Jaguar up to speed too, the sources said.

Jaguar will make an official announcement about the new range at the Frankfurt auto show in September, Reuters reported.

A JLR spokesman said the company would not comment its future product plans at this time.