1938: The W 154 dominates three-litre formula races
Increasing power and speed: in the course of just a few years, the success of 750 kg formula racing cars reached new heights. Output ratings beyond 650 hp and top speeds in excess of 400 km/h on record runs called for a scaling down of engine performance. The three-litre formula limited the displacement of supercharged engines to three litres and that of engines without superchargers to 4.5 litres.
Daimler-Benz adhered to the supercharger principle and developed the W 154. The new car was based on the W 125 but was powered by a completely new V12 engine. It had a cylinder angle of 60 degrees and developed an initial 430 hp from 2962 cm³. It is interesting to note that all the new three-litre cars were faster than the more powerful racing cars entered the previous year.
The first major triumph with the W 154 was accomplished by the Mercedes-Benz team in Tripoli/Libya: Hermann Lang, Manfred von Brauchitsch and Rudolf Caracciola scored a fantastic triple victory. Against strong competition from Maserati, Alfa Romeo, Bugatti and Auto Union, Caracciola brought the 1938 European Champion's title back to Stuttgart-Untertürkheim.