 Complete the following phrase:  Renault-Alpine would be Porsches main opposition in the shorter-format World Championship races. Gérard Larrousse had retired from racing at the end of 1975 and taken up the role of motorsport director at Renault. The company bought out the final share of Jean Rédélé at Alpine and renamed it Renault Sport. Over the winter the A442 had been developed and a longtail version was found to be best for Le Mans. With its Garrett turbo, it could produce 500 bhp and reach 335 kph 210 mph. As the race clashed with the 