Tiff and Jason head to the track in the brand new BMW Z4 and Porsche Boxster. Five years ago the previous versions of the same two cars were the subject of the very first dogfight the Porsche just about edged it, but will it win again?

Tiff Needell goes to the South of France to test the new BMW M5 on the streets of the Le Mans circuit and on a high speed circuit.

Fifth Gear BMW F1 vs BMW M5, Tiff racing in the F1 car against Vicky in the BMW M5

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