What is worse is that Asian cars are not even generic anymore. One of the most profitable automakers, Nissan, is now widely considered one of the boldest designers. G.M. and Ford have been vocal in recent years about making what G.M.'s vice chairman, Robert A. Lutz, calls "gotta-have" cars. But entrenched bureaucracies and cost-cutting pressure do not easily produce elegance.
Cars can fail to measure up on a variety of sensory fronts. Ford's new Five Hundred sedan has been criticized for borrowing an engine from the aged Taurus that lacks pep; a review in Car and Driver magazine lamented that the car "merely oozes forward." The Detroit Free Press criticized G.M.'s Pontiac G6, a sedan pitched as sporty and exciting, for a "rather numb" feel behind the wheel.
Pressure is coming from BMW and Mercedes, selling cars starting around $30,000, and Asian makers offering vehicles under $20,000.
"You want to put money into something you'll get return back from," said Nathaniel Nix, a 37-year-old pastor at a church in the Detroit suburb of Ypsilanti, in an interview this week at a Toyota dealership. Mr. Nix, who was a car salesman for both Ford and Toyota more than a decade ago, said Toyota's higher resale value and more consistent quality made its cars a good investment.
And if Japanese automakers "were the boring ones" in the past, he said now "they're doing an awesome job in the styling realm."
Mr. Nix is in the market for a car because his 16-year-old son, also named Nathaniel, crashed the family's Corolla. The younger Mr. Nix is pressing his father for an xB, an S.U.V. from Toyota's new youth brand, Scion, that looks like a microwave oven on wheels.
Does the younger Mr. Nix like American cars?
"The '67 GT Cobra, the Boss 302 and the old Charger," he said, reeling off vintage Detroit muscle cars.
"What about the new ones?" his father asked.
"Um," his son considered for a moment. "Not really."
As G.M. and Ford lose their grip on American buyers, Michigan's unemployment rate is now the highest in the nation.
"You can't keep losing the market share like G.M.'s losing, you know," said Kenneth Shelton, a 49-year-old machine operator at G.M.'s Willow Run transmission plant in Ypsilanti. The factory, which once produced World War II bombers and covers the space of more than 83 football fields in this Detroit suburb, is down to 3,800 workers today, from about 12,000 two decades ago.
Mr. Shelton and his wife, Joy, met 20 years ago at the time clock. He was punching in, she was punching out. Back then, Willow Run was "like a city that never stopped," said Joy, 48, a quality inspector. "It was just bustling, always bustling, everybody just worked, worked, worked, worked, worked. It was nothing like it is now."
Now, her husband said: "They hit us every day in the papers. We read it. We read it. We pay attention.
"These kind of jobs, where could you find something like this anymore?"
A rising sense of frustration is also evident in executive suites. G.M.'s chairman and chief executive, Rick Wagoner, who has declined interview requests in recent weeks, shook up his senior North American management last month and his company is increasingly on edge. Last week, G.M. pulled its advertising from The Los Angeles Times, the largest newspaper in one of G.M.'s weakest markets, after a columnist said Mr. Wagoner should be fired.
Ford's own troubles came into view last week as the company sharply scaled back its earnings projections and abandoned the cornerstone profit goal of its three-year-old revival plan; its stock fell to a nearly two-year low.
If most on Wall Street do not think bankruptcy is on the horizon because the companies have adequate cash reserves, analysts also see no clear turnaround path. Rising gas prices are weighing on sales of Detroit staples like Ford Explorers and G.M.'s Chevrolet Suburbans. In its profit warning last week, Ford cited as a key factor "the prospect of higher and sustained gasoline prices." Some analysts worry that Toyota and Honda are far better positioned to weather gas prices because they have stronger passenger car offerings and are far ahead in developing fuel-efficient hybrid electric cars.
Rising interest rates shave profits from car loans. Overseas operations drain more than reward. And both companies are flirting with junk bond ratings, which would drive up borrowing costs by billions of dollars.
"Right now, we don't know if we are going to be here another five years," said William Murphy, a 70-year-old lathe operator at G.M.'s Willow Run plant. G.M. recently made an investment in the plant, so it is not likely to disappear.
If it did, Mr. Murphy said his nearly four decades of seniority would come in handy. "I'll be the one to shut the lights down."
Mr. Murphy, a large man in overalls hailed as Murph by co-workers, spoke while eating an Italian ice before his shift, sitting in his sister's car. A Hyundai.