Audi TT

Audi TT

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The production model (internal designation Typ 8N) was launched as a coupé in September 1998, followed by a roadster in August 1999, based on the Volkswagen Group A4 (PQ34) platform used for the Volkswagen Golf Mk4, Skoda Octavia and others. The styling differed little from the concept, except for slightly reprofiled bumpers and the addition of a rear quarterlight windows behind the doors.

Mechanically, the TT uses a transversely mounted engine with front or quattro four-wheel drive. It was first available with a 1.8 L turbocharged inline four cylinder 20-valve engine, with either 180 PS (132 kW) or 225 PS (165 kW). The engines share the same basic design but the 225 PS version features a larger turbocharger, an additional intercooler on the driver's side, forged connecting rods, a dual exhaust, and a few other internals designed to accommodate the increase in turbo boost from roughly 10 psi peak to 15. Haldex enabled four wheel drive branded as quattro was optional on the 180 PS (132 kW) engine, and standard on the more powerful version.