The designers drew inspiration for the new 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 characterise the front end of the new RS5. 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, while tinted bezels differentiate the optional Matrix LED headlights. Blisters on the flanks emphasise the pronounced bulges over the wheel arches, which have been widened by 15mm.
Sporty accents are provided by the RS-specific diffuser insert, the oval tailpipes of the RS exhaust system and surface-mounted spoiler lip. The RS5 rolls on standard 19-inch wheels, with 20-inch wheels available as an option. The appearance packages (gloss black, carbon, matt aluminum) provide even more customisation options. With a length of 4723mm, the new RS5 Coupe is 74mm longer than the previous model.
The 2.9-litre TFSI V6 biturbo engine, which Audi developed from the ground up, offers sharp increases in power and efficiency as well as an incomparably full-bodied RS sound. It produces 450bhp, with peak torque of 600Nm (up 170Nm from the previous RS5) available across a wide band from 1900 to 5000rpm.
The top model in the A5 family sprints from zero to 100km/h in 3.9 seconds and, with the optional dynamic package, reaches a top speed of 280km/h.
The biturbo V6 consumes just 8.7 litres of fuel per 100km, corresponding to 197 grams of CO2 per kilometre. This is an efficiency gain of 17 percent over the previous RS5. Another factor in the greater efficiency of the new coupe is its significantly lower weight. It tips the scales at 1655kg – 60kg lighter than before. A roof of carbon with a visible fibre structure is available as an option.
An updated five-link construction is used on the front axle. At the rear, a five-link suspension replaces the trapezoidal-link suspension used on the previous model. This benefits the sporty driving characteristics and agility. It also improves comfort significantly. With the standard RS sport suspension, the new RS5 sits much lower than the regular A5.
Audi Sport also offers the RS sport suspension with Dynamic Ride Control (DRC), ceramic brakes and dynamic steering with RS-specific tuning. Drivers can make their personal driving experience more individual, dynamic or comfortable using the standard Audi drive select system.
Bathed in black, the interior of the new RS5 Coupe is extremely upscale and sportily appointed. Details such as RS sport seats with optional diamond stitching in fine Nappa leather and the flat-bottomed RS multi-function sport steering wheel underscore the character of the high-performance coupe cockpit.
There are RS logos on the seats, steering wheel, door sill trims and the selector lever. Special RS displays in the Audi virtual cockpit provide information on tyre pressure, torque and g-forces. A shift light prompts the driver to upshift upon reaching the rev limit.
The RS design package uses red as a sporty contrasting color. Package highlights are the steering wheel, selector lever and knee pads in Alcantara, plus seatbelts contoured in red and floor mats with the RS emblem. Audi Sport offers Sonoma green metallic as an exclusive paint finish for the new RS5 Coupe. 
Read our review of the 2-litre Audi A5.
