Volvo is in the midst of a sweeping overhaul of its model range to propel long-suffering sales volumes in the United States back above 100,000 cars per year, to reach total sales of around 800,000 cars in 2020 and make inroads against larger rivals such as Daimler's (>> Daimler AG) Mercedes-Benz, BMW (>> Bayerische Motoren Werke AG) and VW's (>> Volkswagen AG) Audi.

The Swedish car maker gave a preview on Wednesday of the S90 sedan, facing high expectations after Volvo's new flagship SUV, the XC90, helped boost sales in recent months despite a slowdown in demand in China, the world's biggest auto market.

It will be delivered as a petrol, diesel and plug-in hybrid car.

"You need the sedan to be serious in the premium market," Chief Executive Hakan Samuelsson told reporters, adding 2016 would be a ramp-up year with about 15,000 S90 sedans produced.

"We will have around 50,000 when we have full production of the car."

Samuelsson said he still expected a substantial improvement in earnings this year from the 2014 operating profit of 2.25 billion Swedish crowns ($259 million), adding sales had so far been unaffected by VW's emission scandal.

Diesel engines have been in the spotlight since Volkswagen (>> Volkswagen AG) admitted in September it had installed software in up to 11 million diesel vehicles worldwide that understated their emissions of smog-causing nitrogen oxides.

"So far we haven't seen anything in our numbers, but this will be a huge discussion in the business in the future," Samuelsson said.

Total sales at Volvo, bought by China's Geely from Ford (>> Ford Motor Company) in 2010, are up 5 percent so far this year at 441,002 cars, driven by strong demand for the XC60 and XC90.

Volvo has seen its turnover in the United States, once its biggest market but now eclipsed by China, eroding over the past decade. Still, its U.S. sales have increased by 18 percent this year if from a very low comparison.

"We have seen a turnaround in the U.S. In China the market has normalized, you now have the normal balance between price and volume," Samuelsson said.

Volvo sees total sales of around 500,000 cars this year, which would represent a record for the Gothenburg-based company.

(Reporting by Helena Soderpalm, editing by David Evans)