<Tr> <Th> Width </Th> <Td> 1,764 mm (69.4 in) </Td> </Tr> <Tr> <Th> Height </Th> <Td> 1,346 mm (53.0 in) </Td> </Tr> <P> The production model (internal designation Type 8N) was launched as a Coupé in September 1998, followed by a Roadster in August 1999 . It is based on the Volkswagen Group A4 (PQ34) platform as used for the Volkswagen Golf Mk4, the original Audi A3, the Škoda Octavia, and others . The styling differed little from the concept, except for slightly reprofiled bumpers, and the addition of rear quarterlight windows behind the doors . Factory production commenced October 1998 . </P> <P> Early TT models received press coverage following a series of high - speed accidents and the related fatalities which occurred at speeds in excess of 180 kilometres per hour (110 mph) during abrupt lane changes or sharp turns . Both the Coupé and Roadster models were recalled in late 1999 / early 2000, to improve predictability of the car's handling at very high speeds . Audi's Electronic Stability Programme (ESP), or Anti Slip Regulation (ASR) and rear spoiler were added, along with suspension modifications . All changes were incorporated into subsequent production . </P>

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