The new Audi TT Roadster* and TTS Roadster* will launch with two TFSI engines and one TDI clean diesel unit. In keeping with the specifications of the modular transverse platform, all of the engines are installed with the inlet side facing front and inclined twelve degrees to the rear. This allowed the developers to reposition the front suspension much closer to the vehicle’s front end, to the benefit of crash safety and the design.
All three engines are brand-new, two-liter, four-cylinder units with turbocharging and direct fuel injection. They are up to 14 percent more powerful than the engines in the previous model. Fuel consumption of the TTS Roadster was reduced by as much as 15 percent versus the predecessor. Emissions classification for all three is Euro 6.
The TDI clean diesel engine and the TFSI engines use similar efficiency measures. First and foremost are the start/stop system, a recuperation system, friction-reducing measures and the innovative thermal management system, which provides highly precise, demand-based regulation of the coolant circuits for the cylinder head and the crankcase. Another feature common to all three engines is a sound actuator, which comes standard along with Audi drive select. If the driving dynamics system (standard on the TTS Roadster, optional on the TT Roadster) is in dynamic mode, the engine sound becomes even sportier.
7.3 seconds from 0 to 100 km/h (62.1 mph): the TT Roadster 2.0 TDI ultra
With 135 kw (184 hp) and 380 Nm (280.3 lb-ft) of torque between 1,750 and 3,250 rpm, the TDI clean diesel accelerates the new TT Roadster from 0 to 100 km/h (62.1 mph) in 7.3 seconds. Top speed is 237 km/h (147.3 mph). Yet in the NEDC cycle, it consumes just 4.3 liters of fuel per 100 kilometers (54.7 US mpg) – that equates to CO2 emissions of 114 grams per kilometers (183.5 g/mi), which is a new benchmark in the sports car world. As a particularly efficient Audi model, the TT Roadster 2.0 TDI bears the “ultra” label. Audi did pioneering work in this field with the previous model, too.
The four-cylinder diesel, whose 1,968 cc displacement is the result of an 81.0 millimeter (3.2 in) bore and 95.5 millimeter (3.8 in) stroke, is a high-tech engine. Two balancer shafts rotate in its crankcase; the intake camshaft in the separate valve drive module can be adjusted by up to 50 degrees of crank angle. The common rail injection system develops a maximum pressure of 2,000 bar. The adjustable vanes of the turbocharger and the compact intercooler in the induction pipe improve throttle response. The exhaust gas after-treatment system integrated into the engine package quickly comes up to operating temperature following a cold start.
Lean and powerful: the 2.0 TFSI
The 2.0 TFSI, which weighs just over 140 kilograms (308.6 lb), is available in two versions – with 169 kW (230 hp) in the new TT Roadster and with 228 kW (310 hp) in the new TTS Roadster. The two-liter engine has received numerous improvements compared with the previous engine, which an international panel of journalists named “Engine of the Year” in its category five years in a row, Virtually the only thing left unchanged is the displacement of 1,984 cc (bore x stroke 82.5 x 92.8 millimeters [3.2 x 3.7 in]).
With both variants, additional indirect injection supplements FSI direct injection under partial load, which reduces emissions. The Audi valvelift system varies the lift of the exhaust valves, thus improving gas exchange. A compact rotating core module for the thermal management system and the exhaust manifold integrated into the cylinder head make major contributions to efficiency. Operation of the turbocharger’s electric bypass valve is extremely fast and precise.
Just 140 grams CO2 per kilometer (225.3 g/mi): the TT Roadster 2.0 TFSI
In the new TT Roadster, the 2.0 TFSI produces 370 Nm (272.9 lb-ft) of torque over a broad range from 1,600 to 4,300 rpm. It accelerates the compact sports car with front-wheel drive and manual transmission from 0 to 100 km/h (62.1 mph) in 6.2 seconds, and on up to an electronically governed top speed of 250 km/h (155.3 mph). NEDC fuel consumption is just 6.0 liters per 100 kilometer (39.2 US mpg), equating to CO2 emissions of 140 grams per kilometer (225.3 g/mi). With the six-speed S tronic and quattro permanent all-wheel drive, the key figures are 5.6 seconds for the standard sprint, top speed is also 250 km/h (155.3 mph), consumption of 6.7 liters per 100 kilometers (35.1 US mpg) and 154 grams CO2 per kilometer (247.8 g/mi).
Powerful sports car: the TTS Roadster
The top model in the model series, the new Audi TTS Roadster, is pushing into the domain of the powerful sports cars. Here the 2.0 TFSI produces 380 Nm (280.3 lb-ft) from 1,800 to 5,700 rpm. With the optional S tronic, the sprint from 0 to 100 km/h (62.1 mph) takes just 4.9 seconds, and the electronically governed top speed of 250 km/h (155.3 mph) is reached quickly. Nonetheless, in the NEDC cycle, the new TTS Roadster consumes just 6.9 liters of fuel per 100 kilometers (34.1 US mpg) with CO2 emissions of 159 grams per kilometer (255.9 g/mi).
The high-performance four-cylinder unit has been modified in key areas: the pistons and connecting rods, the main bearing seats and the main bearing cover in the crankcase, the cylinder head alloy and the valves. With a maximum charge pressure of 1.2 bar, the large turbocharger can compress up to 1,000 kilograms (2,204.6 lb) of air per hour. A high-performance intercooler greatly reduces the air temperature.
The powerful 2.0 TFSI in the TTS Roadster responds closely to the throttle and revs up to 6,800 rpm. In automatic mode of the Audi drive select system, it responds even more directly with brief double-clutching underscoring the change of gears by the optional S tronic. Two sound flaps in the exhaust system open at higher loads and rpm, making the already sonorous sound even fuller.
The equipment, data and prices specified in this document refer to the model range offered in Germany. Subject to change without notice; errors and omissions excepted.