This is probably the smallest cabriolet, two-seater, missing the windshield, no doors. The Smart Crossblade can also be said to be the coolest little car. It is a product of the collaboration between Germany's Mercedes-Benz Group and Swatch Company. The Smart Crossblade weighs 750 kilograms, has a maximum horsepower of 70hp, torque of 11kgm, with a top speed of 135 kilometers per hour.