When it at last came time to replace Hispano-Suiza’s hallowed H6 model in 1935, the company created a new engine with a shorter 110-millimetre stroke and improved breathing, allowing for more horsepower from fewer cubic inches of displacement. It was mounted to an impressive chassis and equipped with an ingenious four-wheel braking system, which utilizes a driveshaft-mounted servomechanism to multiply the mechanical pressure applied to the brake pedal. Semi-elliptical leaf springs supported both the front and rear axles, and in the engine, liberal use was made of lightweight alloys and high-strength steels, providing a stiff structure that was also lightweight enough to permit very high performance.