Lancia Stratos Zero (1970, Italy)

• A wild wedge of a car by Bertone—barely waist-high with an ultra-low front and no doors (you entered through the windscreen).

• The mechanicals were from a Lancia Fulvia.

• Precursor to the legendary Lancia Stratos rally car—but never meant for production.
  
   

BMW Nazca M12 / C2 (1991–1993, Germany)

• Designed by Italdesign, it was BMW’s V12-powered, carbon-fiber supercar dream.

• Sleek and low with gullwing glass and futuristic lines.

• BMW shelved it—said it didn’t match their brand identity. Enthusiasts have never forgiven them.
  
   

Renault Espace F1 (1995, France)

• What happens when Renault drops a Formula 1 engine into a minivan? You get the Espace F1.

• Carbon fiber body, mid-mounted V10 from a Williams F1 car, 0–100 in 2.8 seconds.

• A hilarious and glorious one-off made to celebrate the Espace and Renault's F1 success.
  
  
   

Jaguar C-X75 (2010, UK)

• Jet turbine-electric hybrid supercar developed with Williams F1.

• 778hp, AWD, carbon chassis—Bond villain car in Spectre.

• Cancelled due to cost and market conditions—Jag fans still mourn it.
  
  
   

Citroën Karin (1980, France)

• A pyramid on wheels, and one of Citroën’s weirdest creations.

• Three-seat layout, with the driver in the center.

• More sci-fi than sensible, but pure 1980s Parisian design madness.
  
  
   

Ferrari Modulo (1970, Italy)

• Designed by Pininfarina, the Modulo looks like it belongs in 2001: A Space Odyssey.

• Covered wheels, canopy entry, ultra-flat body—Ferrari internals underneath.

• Too futuristic for even Ferrari’s boldest clients.
  
  
   

Aston Martin Bulldog (1979, UK)

• Wedge-shaped and brutally beautiful, with a planned 200+ mph top speed.

• Gullwing doors, twin-turbo V8, and dramatic styling.

• Only one was made—rumors say 25 were planned but it was canned due to budget.
  
  
  
   

Mercedes-Benz C111 (1969–1979, Germany)

• Experimental testbed for rotary, diesel, and turbo engines.

• Gullwing doors, striking body, and wild orange paint.

• Built for research, not roads—but Mercedes fans still dream of a production version.
  
  
   

Italdesign Aztec (1988, Italy)

• Twin-cockpit roadster with separate windscreens and a very Bladerunner aesthetic.

• Based on Audi internals, with lots of odd tech touches and switchgear.

• A few were built for collectors—but full-scale production never happened.
  
  
   

 Peugeot Oxia (1988, France)

• A V6 twin-turbo AWD supercar concept with 600hp and a top speed of over 300 km/h.

• Designed for grand touring and high-speed autobahn runs.

• Looked like a French Testarossa but remained a one-off.