Audi. Saturday , November 04th , 2017 - 12:41:26 PM
An important component of the B-cycle combustion process is the central position of the injectors in the combustion chamber. In the area around the inlet valve, this makes possible a geometry which, in interaction with the inlet ports, allows for targeted mixing up of the gas charge. The common-rail system injects the fuel into the combustion chamber with 250 bar of pressure - the high injection pressure ensures a homogeneous spray pattern and consequently a uniform propagation of the flame front.
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.
As standard, the RS5 Coupe rides on 19-inch lightweight forged wheels with 265/35 tires. Upon request, 20-inch wheels in various designs are available, among which the new, especially lightweight fully milled wheel. It uses 275/30 tires. Behind the big wheels are powerful RS steel brakes with perforated composite disks. At the front axle, these have a diameter of 375 millimeters (14.8 in), while at the rear, they measure 330 millimeters (13.0 in). The six-piston brake calipers with RS logos are painted in black, or optionally in red. Upon request, Audi can also equip the front axle with high-performance ceramic brakes featuring six-piston brake calipers and perforated disks with a diameter of 400 millimeters (15.7 in).
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