Amtrak has unveiled at a plant in California the first of 70 new locomotives, marking what the national passenger railroad service said it hopes will be a new era of better reliability, streamlined maintenance and more energy efficiency.

On a broader scale, the new engines displayed Monday could well be viewed as emblematic of the improving financial health of Amtrak, which has long been dependent on subsidies from an often reluctant Congress.

More than 31 million passengers rode Amtrak in the 2012 fiscal year, generating a record $2.02 billion in ticket revenue. Amtrak said it will be able to pay back a $466 million federal loan for the locomotives over 25 years using net profits from the Northeast Corridor line, where ridership hit a record high last year for the ninth time in 10 years.

“The new Amtrak locomotives will help power the economic future of the Northeast region, provide more reliable and efficient service for passengers and support the rebirth of rail manufacturing in America,” Amtrak President Joseph Boardman said in a statement. “Built on the West Coast for service in the Northeast with suppliers from many states, businesses and workers from across the country are helping to modernize the locomotive fleet of America’s Railroad.”

Robert Puentes, a senior fellow in the Brooking Institution’s metropolitan policy program, said Amtrak isn’t the same organization it was a few years ago, relying on federal handouts.

“Even though Washington is mired in debt and dysfunction, Amtrak is reinventing itself,” Puentes said.

The new engines will be used on the Northeast Corridor between Washington, D.C., and Boston and on Keystone Corridor trains that run between Philadelphia and Harrisburg, Pa. Three were unveiled Monday before being sent out for testing. The first is due to go into service by this fall, and all 70 are expected to be in service by 2016.

Amtrak awarded the contract in 2010 to Munich-based Siemens AG, which has made a big investment in the American rail industry over the last decade. The company makes about one of every three light-rail vehicles in North America and is building light-rail vehicles for Minneapolis, Houston and San Diego at the Sacramento plant where Amtrak’s locomotives are being produced.

Among the improvements in the new locomotives are computers that can diagnose problems in real time and take corrective action and a braking system capable of generating 100 percent of the energy it uses back to the electric grid, similar to the way a hybrid automobile’s motor acts as a generator when braking, according to Michael Cahill, CEO for Siemens Rail Systems. That could produce energy savings of up to $300 million over 20 years, the company estimates.

The locomotives also feature crumple zones, which are basically cages built onto the front end of the train that can absorb impact from a collision. The new models will be the first in North America to use them, in compliance with new federal safety guidelines, Cahill said.

The locomotives, called Amtrak Cities Sprinters, are based on Siemens’ latest European electric locomotive and will replace Amtrak equipment that has been in service for 20 to 30 years and has logged an average of 3.5 million miles.

Simply having the same type of locomotive in operation should cut costs, Amtrak spokesman Steve Kulm said. Amtrak now uses three locomotive models, requiring slightly different maintenance, parts and training.

“Now, we will have one model, one inventory and one training program, and all that will help efficiency,” Kulm said.

About 750 people are employed at Siemens’ Sacramento plant. The locomotive project also involves Siemens plants in Columbus, Ohio, Richland, Miss., and Alpharetta, Ga.

The ripple effect spreads farther. As a condition of the Department of Transportation loan, the majority of the products and materials used to build the locomotives must be made in the U.S. As a result, some lighting parts are coming from Connecticut, the driver’s seat from Wisconsin, insulation from Indiana, electronics from Texas and hydraulic parts from California. In all, 70 suppliers in 23 states are providing components, Siemens said.

Amtrak must still seek federal funding for a long list of planned and ongoing improvements, including replacing sections of pre-World War II electrical systems on the Northeast Corridor that cause regular disruptions. The fact that Amtrak has reduced its debt by 60 percent over the last 10 years and its federal operating subsidy to 12 percent could make it an easier sell.

“Ten years ago we were in a tougher spot,” Boardman, the Amtrak president, said last week. “Now Amtrak on the Northeast Corridor is in a much healthier position. We’re trying to maximize that, to the extent we can, to pay for what we should pay for on the Northeast Corridor.”

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