Lamborghini Countach LP 400S

The doors, a Lamborghini trademark first started with the Countach, were scissor doors: hinged at the front with horizontal hinges, so that they lifted up and tilted forwards. The main reason is the car's tubular spaceframe chassis results in very high and wide door sills. It was also partly for style, and partly because the width of the car made conventional doors impossible to use in an even slightly confined space. Care needed to be taken, though, in opening the doors with a low roof overhead. The car's poor rear visibility and wide sills led to drivers adopting a method of reversing the car for parking by opening the door, sitting on the sill, and reversing while looking over the back of the car from outside.
The pure style of the prototype was progressively altered by the evolution of the car to improve its performance, handling, tractability, and ability to meet mandated requirements. This began with the first production model, which included several vents which were found to be necessary to cool the engine adequately. These included the iconic NACA duct on the door and rear fender of each side of the car. The car design changes ended with a large engine vent directly behind the driver, reducing the rear view. Later additions, including fender flares, spoilers, carburetor covers, and bumpers, progressively changed the aesthetic values of the car.
The Countach's styling and visual impression caused it to become an icon of great design to almost everyone except automotive engineers. The superior performance characteristics of later Lamborghini models (such as the Diablo, or the Murciélago) appealed to performance car drivers and engineers, but they never had the originality or outrageousness that gave the Countach its distinction. The different impressions left by the various Lamborghini models have generated numerous debates and disagreements over what constitutes "classic" or "great" automotive design (elegant looks and style, versus technical and engineering superiority).