It was a mighty race car, but according to Silver Arrows legend there was one small issue with it: when the W25 was weighed the day before its first race, it was slightly above the weight limit of 750 kg. Allegedly, the team was able to bring the weight down to within regulatory limits by scraping off its white paint. Without the white paint, the metal bodywork of the car was exposed, giving it a silver look: the first Silver Arrow was born.
However, the W 25 would not only become known for its shimmering bodywork, but also for its impressive on-track performance. Manfred von Brauchitsch won the Eifelrennen in the W 25 the following day, breaking the track record with an average speed of 122.5 km/h. It was the first of many wins for the Silver Arrows.
The W 25 would compete until 1937, the last year of the 750-kg formula. From 1934 to 1937, the vehicle design was constantly modified in the hunt for more performance. Within three years, the engine displacement increased to a maximum of 4.7 litres, raising the output to 646 hp (475 kW). Many famous racing drivers competed in the W 25, among them Rudolf Caracciola and Luigi Fagioli.