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It has been rumoured Audi have been working on a diesel engined version of the TT coupe, and now for the first time we have photographic evidence to confirm these rumours are true. Likely to be badged as the Audi TT TDi, this test car was caught in northern Sweden and fortunately our spy was able to get a shot of the interior complete with a warning sticker saying Achtung diesel-Fzg (Attention diesel version) .

The TT TDi will use Volkswagen's 168bhp 2.0-litre turbodiesel which we have already seen in the Audi A4 and VW Tiguan, we should see it launched sometime in 2008.