Video - ► Audi RS 4 Avant 2013

► Audi RS 4 Avant 2013

The strong heart of the new RS 4 Avant has eight cylinders. The 4.2 FSI, which displaces 4,163 cc, combines excellent pulling power with instant response and an exhilarating willingness to rev, all backed by a widely differentiated, musical sound spectrum. The V8 produces 430 Nm (317.15 lb-ft) of torque from 4,000 to 6,000 rpm and puts out 331 kW (450 hp) at 8,250 rpm. The maximum torque is 8,500 rpm. The naturally aspirated FSI has a specific power output of 79.5 kW (108.1 hp) per liter of displacement; each hp only needs to move 4.0 kilograms (8.82 lb) of weight.

The 4.2 FSI accelerates the new top model in the A4 family from zero to

100 km/h (62.14 mph) in 4.7 seconds on its way to a governed top speed of

250 km/h (155.34 mph). This can be increased to 280 km/h (173.98 mph) upon request. The eight-cylinder engine averages 10.7 liters of fuel per 100 kilometers (21.98 US mpg) -- 26 percent less than the previous model.

The technologies from the Audi modular efficiency platform are behind this impressive figure. The cylinder barrels and the chain drive are characterized by minimal friction, and the oil pump is demand-controlled.

The normally aspirated V8 is also a visual experience. Its cylinder head covers are painted red, and an optional carbon inlay adorns the intake plenum. The hand-built 4.2 FSI has a classic cylinder angle of 90 degrees. The two opposing banks are offset by 18.5 millimeters.



The V8 weighs just 216 kilograms (476.2 lb). The forged crankshaft, the forged steel connecting rods and the pistons forged from a high-strength aluminum alloy are all lightweight, yet strong. The crankcase is manufactured using the low- pressure die-casting method, which ensures particular homogeneity. The aluminum-silicon alloy combines low weight with high strength. Its high silicon content makes the cylinder barrels extremely durable.

Model

• Audi 80 / 90

Videos

• Audi 90