Audi. Saturday , November 04th , 2017 - 12:30:10 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.
Bathed in black, the interior is of an extremely high standard and sportily equipped. RS sport seats - optionally available in fine Nappa leather with honeycomb pattern - and the flat-bottomed RS multifunction sport leather steering wheel underscore the character of the high-performance Coupe in the interior as well. The steering wheel rim bears the RS badge, as do the front seat backrests and the shift gate. Special RS displays in the Audi virtual cockpit provide information on tire pressure, torque and g-forces. A shift light prompts the driver to upshift upon reaching the rev limit. The RS design package brings the sporty contrast color red into play on the center console as well as on the armrests, the seat belts and the floor mats with RS logo. The steering wheel, selector lever and knee pads are all covered with Alcantara. The Sonoma green design package from Audi exclusive enriches the interior with appropriately colored contrasting stitching - perfect for the new, exclusive exterior color.
A further efficiency component of the 2.9 TFSI is the thermal management system. The crankcase and the cylinder head have separate coolant circuits. After a cold start, the switchable water pump controls the flow of coolant through the engine so that the oil is warmed up as quickly as possible. The exhaust manifolds are integrated in the cylinder head, and coolant circulates around them which helps ensure rapid warming up. When the engine is warm, this technology lowers the exhaust temperatures - consumption drops drastically, especially when driving in a sporty way. The great efficiency of the V6 bi-turbo is also partly to do with low friction. For example, the fully adjustable oil pump only builds up as much pressure as necessary.
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