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680 S Saoutchik Torpedo Roadster
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  Mercedes-Benz 680 S Saoutchik Torpedo Roadster
 

  Article Image gallery (54) Chassis (1) Specifications  
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Country of origin:Germany
Produced in:1928
Numbers built:12 (This body style)
Designed by:Saoutchik
Author:Wouter Melissen
Last updated:August 29, 2012
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Click here to download printer friendly versionFerdinand Porsche moved from Daimler's Austrian subsidiary to company headquarters in Stuttgart to replace Paul Daimler as chief designer in 1922. His first task was to develop a new supercharged engine for Mercedes' top of the range models, which at the time were still powered by big and heavy airplane engines. Following his brief, Porsche created a new six cylinder engine that was available with a displacement of either 4 or 6.3 litre.

The new engines' first application was in big, heavy chassis that really were no match for the powerful 'sixes' in terms of both handling and braking. A racer at heart, Porsche was eager to develop a chassis that his engine more justice. Sadly resources were limited at the time but he did manage to create the 630 K (for Kurz or short). As the name suggested, this combined the largest of the two engine with a shortened version of the chassis that in its original form had been large enough to carry 7-passenger limousine bodies.

Additional funds finally did become available following the merger of Daimler and Benz in 1926. Porsche wasted no time and set about developing a brand new chassis that would do 'his' engine more justice. The new car was based around a pressed-steel ladder frame that kicked up over both the front and rear axle. This allowed for a much lower ride-height than the earlier Mercedes models. The suspension itself was of a conventional design with leaf springs and friction dampers on all four corners. The stopping power was provided by large servo-assisted drum brakes.

For this new application, the straight six was also further developed and enlarged to just shy of 6.8 litre. The sophisticated engine featured an aluminium alloy block with a cast-iron head. A single overhead camshaft was fitted, which driven by a shaft at the rear of the engine. Mounted vertically at the front of the engine was a Roots-type supercharger. This was only engaged when the accelerator pedal was pressed to the floor. It was advised to use the supercharger for no more than 15 seconds for reliability reasons. Once against, it freed up around 180 - 225 bhp depending on the tune of the engine.

Dubbed the 680 S, for Sport, the new Mercedes-Benz debuted at the June 1927 opening race at the Nürburgring. Fitted with a simple four-seater body and a high compression / high boost engine, the 680 S proved a race winner straight out of the box, winning the first ever race at the now legendary circuit as well as the German Grand Prix soon after. The new Mercedes-Benz not only impressed with its undeniable pace but also stood out from the rest of the field thanks to the glorious whine produced once the supercharger was engaged.

Soon after its victorious debut, the 680 S entered series production. It was available with factory or 'Sindelfingen' coachwork or as a rolling chassis ready to receive the custom body of the client's choice. Thanks to the relatively low chassis, the new Mercedes-Benz was a popular subject for the time's finest designers like Jacques Saoutchik. Even with the 'standard' coachwork, the 680 S was a striking machine in part due to the remarkably long engine cover.

By the end of 1928, Mercedes-Benz had produced close to 150 examples of the 680 S. At that time it was replaced by the slightly larger engined 710 SS. Further derivatives include the SSK and SSKL competition cars, which used a shorter chassis. Known as the 'White Elephants', the supercharged range that kicked off with the 680 S ranks among the finest and most desirable produced by Mercedes-Benz.

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  Article Image gallery (54) Chassis (1) Specifications