Toyota Sera
At first glance, the Toyota Sera looks like a generic Japanese compact from the early â90s. But, when you open the door, you will see why this little car is so special. They built it on a regular Corolla platform and powered it with an ordinary 1.5-liter four-cylinder. In fact, the Sera is technically a regular car, but the design and technical solutions of the cabin, doors, and roof are unique.
The production of this feature was demanding, so Toyota needed special tools and machines just to fabricate door mechanisms and make the specially curved glass. However, the Toyota engineers managed to pull it off, introducing the Sera in 1990. It stayed in production until 1996, during which time they built over 16,000. Unfortunately, they sold almost all of them exclusively in Japan.