Design an ultra-high-definition image featuring a metallic silver supercar with aerodynamic curves, carbon fiber accents, and a stance suggesting speed and luxury. Beside it, render a rugged, matte black main battle tank, its heavy treads packed with earth, the turret equipped with a state-of-the-art targeting system, and reactive armor plates covering its hull. The environment is a juxtaposition of a smooth asphalt runway and a rough, off-road terrain under a dusk sky, highlighting the contrast between technological advancements in automotive speed and military defense.