Our favorite British automotive blow-hard, one Jeremy Clarkson, is usually out to prove just how fast cars can go. During one episode of Top Gear he changed direction to see just how economically he could make the round trip from London to Edinburgh in an Audi A8 TDI. The A8 is equipped with a 4.2L twin turbo diesel V-8 that puts out 326hp and pushes the big A8 to 60 mph in 6 seconds. Under normal conditions, Audi says, the A8 will get about 17.5 mpg (U.S.). In order to make the trip on a single tank Clarkson would have to average about 33.6 mpg for the 800 mile journey. He filled the tank in London with 23.8 US gallons of diesel and set off to try some hypermiling. If you enjoy seeing Jeremy Clarkson in discomfort as he tries to avoid unnecessary stops that would add to fuel consumption check out the video after the jump.

[Source: GermanCarBlog, thanks to Christian for the tip]


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