The Daren Mk.5 is the fifth sports prototype racing car built by Daren Cars (now Hydrautug).
History John Green would attempt to restart the company in 1980, modifying an Osella PA5 for racing with a Chevrolet LB9 small-block from a California market Chevrolet Camaro. The car would be built for Group 6, and because the engine was from a production model, it would be allowed to be up to , which meant the LB9 would be sleeved from its standard bore and stroke of , to , for a total displacement of . The car would place 26th at its first race in the 1980 Italian Championship Group 6 Varano race, and given its poor results, the project would not be continued for the next race. The reason for its failure was almost purely the fact that it was overweight and underpowered. The Osella PA8-BMW that would go on to win the event, would weigh at least less than the Mk.5, whilst having at least more than the Mk.5.
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