Mercedes 190 2.5-16v Cosworth
The introduction of the special edition 2.3-16v model in 1983 came from Mercedes Benz desire to re-enter motorsport with a direct factory team after their retirement following the tragic events at the 1955 Le Mans race. Enlisting the help of the British engineering firm Cosworth Mercedes had plans to take the 190 to the rally circuit, however the project suddenly became unrealistic when Audi released the turbo charged, 4 wheel drive Quattro, in effect beating the 190 before the race had even started! Mercedes not wanting to lose their financial investment in development ditched plans for the rally circuit and turned their attention to the German touring car championship.
The Cosworth engine was based on the 2.3 litre 8 valve already fitted to models in the range. Cosworth added an alloy head with twin overhead cams and 4 valves per cylinder boosting power to 185bhp and 174lb-ft. The car proved incredibly robust, with three cars only cosmetically altered completing a 50,000 km endurance test at the Nardo testing facility averaging 154.06mph and earning Mercedes three world records and nine international endurance records.
A larger 2.5 litre engine replaced the 2.3 in 1988. The 2.5 utilised a double valve timing chain to fix the problem of the single chains snapping on the 2.3. The increase in capacity took power to 204bhp in the non catalyst car.