Synopsis: Jeremy goes on a fuel economy run by driving an Audi A8 (with a V8 diesel engine) from London to Edinburgh and back in one single fuel tank. James races a racing pigeon in the new Ford SportKa. A 2nd shootout on the test track between the new Mitsubishi Evo VIII FQ-320 and the Subaru Impreza WRX STi WR-1. James and Richard have a game of 'car darts'. Jeremy road tests the new Porsche Carrera GT.
Watch Top Gear Season 4 Episode 4: 4.4 - Version 1
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