Audi. Saturday , November 04th , 2017 - 12:39:27 PM
In the classic Miller cycle, the reduced cylinder charge is detrimental to torque and power output. These aspects have been neutralized by Audi thanks to the implementation of turbocharging and the two-stage Audi valvelift system (AVS). The four camshafts of the 2.9 TFSI can each be adjusted by 50 degrees crank angle. At higher load and engine speed ranges, AVS closes the inlet valve later. The opening time increases from 130 to 200 degrees crankshaft angle, while at the same time the valve lift increases from 6.0 to 10.0 millimeters (0.2 to 0.4 in). Cylinder charging also increases considerably - the 2.9 TFSI revs up powerfully and delivers an impressive output.
Each of the two turbochargers on the 2.9 TFSI is assigned to a single cylinder bank and can build up a maximum of 0.95 bar charge pressure. Like with all new V6 and V8 engines from Audi, the turbochargers are installed within the 90-degree angle of the cylinder banks, and thus the exhaust side of the cylinder heads is on the inside, while the intake side is on the outside of the engine. This layout enables compact construction and short gas flow paths with minimal flow losses - the 2.9 TFSI responds extremely spontaneously to movement of the accelerator pedal.
The designers drew inspiration for the RS5 Coupe from the distinctive racing details of the Audi 90 quattro IMSA GTO. Massive air inlets with the honeycomb structure typical of RS models characterize the front end of the car. The Singleframe radiator grille is much wider and flatter than in the base model. Next to the headlights are additional lateral air intakes and outlets; tinted bezels differentiate the optional Matrix LED headlights. quattro blisters on the flanks emphasize the pronounced bulges over the wheel arches, which have been widened by 15 millimeters (0.6 in). As standard, these house 19-inch forged aluminum wheels, with 20-inch wheels available as an option. A sporty conclusion to the vehicle is provided by the RS-specific diffuser insert, the oval tailpipes of the RS exhaust system and a surface-mounted spoiler lip. With a length of 4,723 millimeters (185.9 in), the new Audi RS5 Coupe is 74 millimeters (2.9 in) longer than the previous model.
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