Mollie Slater. Audi. October 13th , 2017.
The new Audi RS5 Coupe demonstrates its sporty character as a gran turismo at first glance. The designers drew inspiration for the car from the distinctive motorsport details of the Audi 90 quattro IMSA GTO. The front, sides and rear exhibit RS-typical differentiation. Measuring 4,723 millimeters (185.9 in) in length, the second generation of the Audi RS5 Coupe is 74 millimeters (2.9 in) longer than the predecessor model. The height is 1,360 millimeters (53.5 in) and thus 6 millimeters (0.2 in) lower than previously. At 1,861 millimeters (73.3 in), the vehicle’s width is almost the same as before.
Hot-formed parts form the high-strength, crash-safe backbone of the occupant cell. They reinforce the transition from the front body to the interior, the front zone of the roof frame, the B-pillars, side sills and parts of the floor. The proportion of these parts in the body structure is 17 percent. A carbon roof with visible fiber structure is also available as an option, delivering a further weight saving of 3 kilograms (6.6 lb).
The 2.9 TFSI was derived from the 3.0 TFSI used in the Audi S5. Because of the greater forces inside the engine, the valve lift has been shortened by 3 millimeters (0.1 in) to 86 millimeters (3.4 in). With its unchanged bore of 84 millimeters (3.3 in), the displacement is 2,894 cm3. The crankcase integrates thin-walled cylinder liners made of gray cast iron and the crankshaft main bearing has a 2-millimeter (0.08 in) larger diameter compared with the 3.0 TFSI.
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.
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