DAF 55 Marathon Variomatic
The DAF 55 Marathon holds a unique place in automotive history as one of the earliest production cars to feature a continuously variable transmission (CVT). The Variomatic system, developed by Hub van Doorne at the Dutch truck manufacturer DAF, used rubber belts running on expanding pulleys to provide a seamlessly variable drive ratio. While CVTs would eventually become commonplace in the 21st century, DAF was pioneering this technology in the 1950s.
The Marathon variant of the DAF 55 was the sporty flagship, distinguished by its Renault-sourced 1,108 cc four-cylinder engine producing 57 horsepower. This represented a significant upgrade over the flat-twin engines used in earlier DAF models. The Renault engine gave the 55 genuine highway capability, with a top speed of 135 km/h making it viable for motorway cruising.
The Variomatic transmission was the car's defining feature. Using twin rubber V-belts running on centrifugally operated expanding pulleys, the system provided an infinitely variable drive ratio between the engine and rear wheels. In practice, this meant the engine always operated near its optimal speed, improving both performance and fuel economy. The system was also uniquely simple to drive, with no gears to select, making it popular with drivers who found conventional manual transmissions intimidating.
A charming quirk of the Variomatic system was that the car could travel as fast in reverse as it could forward, since the belt-drive mechanism was essentially bidirectional. This led to a famous DAF tradition of entering rallies with the cars running backwards, a stunt that delighted spectators and generated enormous publicity.
The Marathon designation came from the car's rally achievements. DAF competed extensively in European rallies, and the 55 Marathon proved surprisingly competitive in its class. The Variomatic's ability to keep the engine in its power band provided an advantage on technical stages, and the car's light weight and nimble handling allowed skilled drivers to exploit terrain that challenged more powerful competitors.
The chassis used independent suspension all round, with trailing arms and a transverse leaf spring at the front and a swing axle with coil springs at the rear. Handling was adequate for normal driving but the swing axle rear could be unpredictable at the limit.
The DAF 55 Marathon is a fascinating collector car that represents a pivotal moment in automotive technology. Its pioneering CVT technology, Dutch engineering heritage, and endearing character make it a unique addition to any collection.
Variomatic rubber belts are the most critical maintenance item and must be checked for condition. Body rust is common in the sills, floor pans, and wheel arches. The Renault engine is reliable with good parts availability. Check the centrifugal clutch mechanism for wear. DAF enthusiast clubs in the Netherlands are an excellent resource.
The DAF 55 was produced from 1968 to 1972 at DAF's car factory in Born, Limburg. The Marathon was the sporting variant. DAF's car division was later acquired by Volvo.