(continued from above)
Aesthetic design, innovative technology and impressive sportiness: The RS 7
Sportback, the large five-door coupe from Audi, combines many strengths to
produce a fascinating character. Its strong heart is the 4.0 TFSI, which takes
Audi's downsizing strategy to the high-end category. The twin-turbo V8 displaces
3,993 cc and develops awesome power, with 560 hp available between 5,700 and
6,700 rpm. A constant 700 Nm (516.29 lb-ft) of torque are available between
1,750 and 5,500 rpm.
Because the high-revving four-liter engine has been rigorously designed for low
load-change and flow losses, it develops this power quickly and spontaneously.
The cylinder heads have the exhaust side on the inside and the intake side on
the outside. The two twin-scroll turbochargers, which produce up to 1.2 bars of
relative boost pressure, are located together with the intercooler in the inside
V of the cylinder banks. Consequently, the gas paths are very short and response
very good. The RS-specific engine management and unthrottled intake system also
contribute to the dynamic character of the twin-turbo V8. Switchable flaps in
the exhaust system make the engine sound even fuller at the push of a button or
under strong acceleration. Audi also offers an optional sport exhaust system.
The RS 7 Sportback sprints from 0 to 100 km/h (62.14 mph) in just 3.9 seconds.
Audi limits the top speed in the standard configuration to 250 km/h (155.34
mph). Top speed with the optional dynamic package is 280 km/h (173.98 mph) and
305 km/h (189.52 mph) with the dynamic package plus.
Yet the new top model of the model series consumes on average just 9.8 liters of
fuel per 100 km (24.00 US mpg). This top value is due in part to the standard
start-stop system and innovative thermal management.
The most innovative efficiency technology in the new Audi RS 7 Sportback is the
cylinder on demand (COD) system. At low to medium loads and engine speeds, it
deactivates cylinders 2, 3, 5 and 8 by closing their valves via
electromechanical actuators. The 4.0 TFSI then runs as a four-cylinder engine
until the driver accelerates more strongly again. The operating points in the
active cylinders are displaced toward higher loads, increasing efficiency.
All of these operations take just a few hundredths of a second and occur so
smoothly and quickly that they can hardly be felt or heard. Active engine
bearings, another high-end solution from Audi, use out-of-phase
counter-oscillations to compensate for the slight vibrations that occur during
four-cylinder operation. The COD technology reduces NEDC fuel consumption by
roughly five percent, and even greater savings of approximately 10 percent are
possible when driving at moderate speeds.
The standard eight-speed tiptronic is specially tuned to the sporty character of
the Audi RS 7 Sportback. Drivers can choose between the modes D and S or change
gears themselves using the shift paddles on the steering wheel or the selector
lever, which sports a unique RS design. While the lower gears of the tiptronic
are closely spaced for sporty response, eighth gear is tall like an overdrive to
reduce fuel consumption.
Audi RS 7 Sportback: Review (2/2)