2. Volkswagen XL1
The Volkswagen XL1 looked like it drove straight out of a sci-fi movie.
With its sleek teardrop shape and gullwing doors, this two-seater was engineered for maximum efficiency.
Underneath, it combined a tiny diesel engine with electric motors—delivering mind-blowing fuel economy that even modern EVs envy.
According to Top Gear, the XL1 was once the world’s most economical production car.
Its limited run and futuristic vibe make it a true oddball we wish we saw more often on the road.