German cars are some of the most popular and well-known vehicles in the world. AUDI, Opel, Porsche, and BMW are all German car manufacturers that have been around for decades. AUDI is a luxury car brand that has been producing vehicles since 1909. Opel is a subsidiary of General Motors and has been producing cars since 1862. Porsche is a sports car manufacturer that has been producing cars since 1931. BMW is a luxury car brand that has been producing cars since 1916. All four of these companies have become synonymous with German engineering and quality.