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On May 9, 2026, evo 350 hits stores and online with a feature that trades the usual “greatest hits” for a tour of the 2000s’ greatest misses. The decade gave us the Mercedes-McLaren SLR, the Maserati MC12 and the Bugatti Veyron. It also produced an unusually large pile of supercar concepts that stayed in museums, video games and design studios. Audi, Cadillac, Citroen and BMW all took a swing at building a low-volume halo car. Only one left a visible mark on a production machine that followed.
The same issue also includes a test of six of the decade’s most significant mainstream supercars, so it isn’t just a trip down memory lane. It’s a look at why some projects crossed the line and why others never made it past the display stand.
Audi kicked off the 2000s with one of its strangest show cars. The Rosemeyer, unveiled at the 2000 Geneva Motor Show, mixed the aero teardrop shapes of 1930s Auto Union racers with a thoroughly modern W16 engine. There was even an open-gate manual gearbox inside, which made the concept feel less like a digital fantasy and more like a driver’s car that happened to be wearing unusual clothes.
The name honored Bernd Rosemeyer, the Auto Union legend killed in a speed record attempt. But despite the romantic backstory, the project never gathered real momentum. Audi was clearly torn between retro sentiment and the future. That future eventually arrived in the form of the Le Mans Quattro concept, which spawned the production R8. The Rosemeyer was pushed aside, and today it remains a what-if with a 16-cylinder heartbeat.
Cadillac’s answer to the supercar question arrived in 2002. Superficially, the Cien looked like a concept designed in a wind tunnel and then sharpened with an axe. The angular nose and crisp creases were supposedly inspired by the F-22 Raptor fighter, and they perfectly matched GM’s then-current “art and science” design direction.
The Cien wasn’t just eye candy. Under the rear deck sat a 7.5-liter V16 rated at around 750 horsepower. Cadillac marked its centenary with this car, whose name is the Spanish word for “one hundred.” For a while, executives seriously considered building it.
The problem was platform cost. A bespoke chassis for such a low-volume model would have been wildly expensive, and GM had no existing supercar architecture to borrow. So the Cien went from auto-show pedestal to Gran Turismo, where millions of players could drive it for free. That may have been the most successful part of the project: it made Cadillac look bold without forcing the company to build a money-losing machine.
Citroen’s GT concept came at the problem from the opposite direction. It was created in 2008 as part of the Gran Turismo universe, with Polyphony Digital collaborating on the design. The car’s first public appearance was inside a video game, not a convention hall.
In the game, the GT was powered by hydrogen fuel cells. In the real world, Citroen did build a working prototype, and it reportedly used a Ford V8. Yet the production plans never went anywhere, and it’s easy to see why. Citroen had no supercar heritage, no racing pedigree and no established audience for an exotic coupe. People knew it for hatches and hydropneumatic suspension, not for six-figure mid-engine machines.
The GT remains one of the most frustrating concepts of the era. It looked sensational, it offered a fresh take on how a car can exist in both physical and virtual spaces, and it still didn’t have enough brand weight to justify a business case.
BMW was in a different position. It already had the M1, one of the most beloved supercars of the late 1970s. So when the German manufacturer unveiled the M1 Hommage in 2008, it wasn’t just showing off a new styling language; it was paying respect to its own history.
The Hommage had the short overhangs, wide rear shoulders and low nose of the original M1, but wrapped in a modern interpretation. BMW was careful to call it a design study, and it never entered any serious production evaluation. The car was meant to create buzz, not to become a dealership order.
Still, it didn’t vanish without a trace. Years later, the Hommage’s layered surfacing and coupe-like proportions appeared in the BMW i8. That hybrid supercar was a very different machine, but its visual lineage runs directly back to the 2008 tribute. So the M1 Hommage did influence a production car, even if the engine was no longer vinyl roof-era V10 drama.
The reasons are usually explained in business terms, but they’re really about three things: money, identity and timing.
A low-volume supercar needs a platform. If the company doesn’t already have a suitable one, it has to design a new chassis, crash-test it, develop bespoke suspension and then sell maybe 500 cars a year. That math rarely works unless the car carries huge profit margins or massive brand value.
Then there’s identity. Audi could build a supercar because it had the Quattro brand. Cadillac was still fighting perceptions of being a land-barge maker. Citroen never shook its utilitarian image. BMW had the M1, but the company’s direction in 2008 was firmly focused on sustainability and efficient dynamics. A retro supercar simply didn’t fit the story.
Finally, timing mattered. The mid-2000s were a strange period. The Veyron proved that impossible engineering could exist if someone else’s balance sheet was deep enough. But not every group wanted that kind of risk, especially in the years before hypercar prices began their climb into absurd territory.
Looking back, the Rosemeyer, Cien, GT and M1 Hommage feel more honest than many modern teaser videos. They didn’t pretend to be production-ready. They were experiments, both visual and commercial.
They also predicted something important. The Citroen GT’s virtual-first existence is now the industry norm. Automakers routinely reveal “new cars” with digital renders and in-game assets before anyone sits in the real thing. Cadillac’s Cien proved that a concept could live on as a downloadable vehicle even if it never became a physical product. Audi’s Rosemeyer showed the risk of looking too far backward in a market obsessed with the future. And BMW’s M1 Hommage demonstrated that concept cars can serve as vision documents, with pieces of their DNA showing up years later.
There’s an obvious question: would any of them have worked in production? Probably not, at least not in the form we saw. That’s why they remain perfect subjects for evo 350. They weren’t failed cars as much as ungreenlit possibilities—and sometimes the best story is the one that never happened.
The full feature, plus the test of six era-defining mainstream supercars, is in evo 350, in stores now or online through the evo shop.
