 Four-cylinder models were introduced in 1903, along with the six-cylinder "Spyker 60 HP", a racer which was the world's first ever four-wheel drive car with a single engine and four-wheel brakes.It was the first ever car built with front-engine, four-wheel-drive layout, and its engine with six cylinders was also a world's first.The 1905 cars featured a round radiator grille, which became a feature of many of the pre war cars.