[citation needed] Audi did not offer an automatic transmission option for the TT until 2003, when it offered a dual clutch six-speed Direct-Shift Gearbox (DSG), with the United Kingdom TT variants becoming the world's first market for a dual clutch transmission configured for a right-hand drive vehicle, although the outright world first for a road car equipped with a dual clutch transmission was claimed earlier by a Volkswagen Group platform-mate, the left hand drive Volkswagen Golf Mk4 R32.

NSU marque began competing at the Isle of Man TT in 1907 with the UK manager Martin Geiger finishing in fifth position in the single-cylinder race.

Early TTs were cited in a series of fatalities from accidents involving speeds over 112 mph (180 km/h), abrupt lane changes or sharp turns.

[13] Audi's Electronic Stability Programme (ESP) or Anti Slip Regulation (ASR) were added, as well as a rear spoiler, along with modifications to the suspension system.

The engines share the same fundamental design, but the 225 PS version features a larger K04 turbocharger (180 PS version came with a smaller K03), an additional intercooler on the left side (complementing the existing right-side intercooler), larger 20mm wrist-pins, a dual tailpipe exhaust, intake manifold with inlet on driver's side, and a few other internals – designed to accommodate the increase in turbo boost, from roughly 10 pounds per square inch (0.7 bar) peak, to 15 pounds per square inch (1.0 bar).

In July 2003, a new six-speed dual clutch transmission – dubbed the Direct-Shift Gearbox (DSG), which improves acceleration through much-reduced shift times, was offered, along with a stiffer suspension.

Built by AUDI AG's high-performance specialist subsidiary quattro GmbH, it had increased power from its 1.8-litre turbocharged engine – rising to 240 PS (177 kW; 237 hp) and 320 N⋅m (236 lbf⋅ft) of torque – and a reduction in weight of 75 kg (165 lb) to 1,390 kg (3,064 lb),[16] which allowed for a 0–62 mph (0–100 km/h) time of 5.9 seconds, and an electronically limited top speed of 155 mph (249 km/h).

[16] Distinguishable from other TT Coupés by its two-tone paint scheme (Phantom Black pearl painted roof, pillars and mirror housings, in combination with either Avus Silver, Phantom Black, Mauritius Blue or Misano Red body colour)[16] and unique 18" 15-spoke cast aluminium alloy wheels, plus the same body kit as fitted to the TT 3.2 V6, the TT quattro Sport also featured black exhaust tailpipes and uprated suspension settings and new wheels, 1⁄2 in (13 mm) wider at the rear for improved handling.

In May 2008, a class action suit reached a nationwide settlement regarding allegedly defective instrument clusters on 2000–2004, and 2005 model year Audi TTs.

Owners were entitled to submit claims for repairs, replacement and/or cash reimbursement for out-of-pocket expenses and received a two-year instrument cluster warranty extension.

[18] For the 30th anniversary Quattro gmbH unveiled an Imola Yellow TT that sported a 2.7 L Bi-Turbo V6 engine from a B5 Audi RS4 that produced 280 kW (381 PS; 375 hp) and 440 N⋅m (325 lb⋅ft) at 2,500 rpm[19] which was manufactured in 2001.

[20] A preview of the second-generation TT was provided in the form of the Audi Shooting Brake concept car, shown at the Tokyo Motor Show in 2005.

[21] Audi debuted the second-generation TT, internal designation Type 8J, on 6 April 2006, using the Volkswagen Group A5 (PQ35) platform with aluminium front bodypanels, and steel in the rear, to enhance its near-neutral front-to-rear weight distribution.

This is based on BWI Group's MagneRide, which uses magneto rheological dampers (this means that an electronic control unit for the suspension will automatically adjust its damping properties depending on the current road conditions and driving manner).

[28] Audi claims average fuel consumption for the Coupé variant with this 2.0 TDI engine is 5.3 litres per 100 kilometres (53.3 mpg‑imp; 44.4 mpg‑US), which achieves a CO2 emissions rating of 139 gram/km.

[33] Radially ventilated front disc brakes are clamped by a single-piston gloss black caliper emblazoned with a bold TTS logo, and a lap timer is prominent in the centre of the instrument cluster.

[39] LED daytime running lamps, an aggressive body kit with large frontal air intakes, black-painted "single frame grille" and a lower spoiler lip complete the new look from the front.

[39] Whilst the TT Clubsport quattro is primarily a "show car", Audi has not ruled out the possibility of small-scale production.

[41][44] Additions to the quattro system include a constant velocity joint before the cardan propeller shaft, and a compact rear-axle differential – upgraded to cope with the increased torque from the five-cylinder turbo engine.

Also carried over from the B7 RS4 is the "Sport" button, which sharpens the throttle response and deepens the exhaust note, and a three-stage user-selectable Electronic Stability Programme (ESP).

[54] In 2019, the models were updated with the following specifications[citation needed]: The third generation Audi TT features temperature and airflow controls embedded in the air-vents.

[57] In 2016, the MQB-based Audi TT RS coupé and roadster were announced with the five-cylinder 2.5 litre TFSI engine now producing 294 kW (400 PS; 394 hp) and 480 N⋅m (354 lb⋅ft) of torque between 1,700 and 5,850 rpm.

The 15 Factory built TT RS Audi Sport Performance parts edition cars had their own build type and known as ultra rare around the world.

In October 2022, Audi launched the TT RS Coupé Iconic Edition, available only in Europe and produced 100 cars (of which only 11 are right-hand drive).

The Final Edition TTs feature black exterior accents consisting of the tailpipes, badges and rings, door mirrors, and fixed spoiler.

On the interior, the Final Edition is equipped with the extended leather package, which adds the material to the center console trim, armrests, and door pull handles.

[63] In auto racing, the Istook's Motorsports team has currently entered a Revo Technik-sponsored Audi TT in the Grand-Am KONI Sports Car Challenge Street Tuner (ST) class.

The SUV utilized a hybrid system coupled with the 2.0-litre TFSI Inline-4 engine producing a total of 304 kW (413 PS; 408 hp) and 649 N⋅m (479 lb⋅ft) of torque.

The interior is relatively close to the TT's with leather upholstery from Italian fashion brand Poltrona Frau and features a high-tech TFT display in front of the driver populated with the information that would normally be projected onto a central, dash-mounted screen—i.e.

[70][71] Due to Audi's heavy sponsorship of the Marvel Cinematic Universe, the TTS coupe made a cameo in Avengers: Age of Ultron.