An outstanding role has been played by the 1,500 cc BMW M10 engine block. The four-cylinder started with modest 75 hp (56 kW) in 1961, became successful in touring cars, developed over 300 hp (224 kW) in 1970s Formula Two, and at the ripe age of a quarter century, produced almost twentyfold its original power in the 1986 turbocharged BMW M12/13/1, producing an outstanding 1400 hp.