The Audi RS4 is the sportiest version of the Audi A4 from the German car manufacturer Audi. The Audi RS4 is still above the Audi S4 posted slightly less sporty. The Audi RS4 has to compete with other performance cars such as the BMW M3, Mercedes-Benz C-Class AMG, and Lexus IS-F. The Audi RS 4 is developed by Quattro GmbH. “RS” stands for “Renn Sport” what Audi models top line is still above the S (“Sport”) models are positioned.
Audi RS4 B5
The Audi RS4 was introduced in 1999 based on the Audi A4 B5 as Avant and remained until 2001 in production. Audi RS4 is the successor along with Porsche developed Audi RS2. The Audi RS 4 has a 2.7-liter V6 Biturbo engine with five valves per cylinder that delivers an output of 380 hp and a torque of 440 N.m. This is the same engine as the S4 B5 provides standard 265 hp and 400 Nm. But thanks to several modifications to the air intake, cylinder heads, and turbo’s capacity could be increased to 380 hp. The fuel is injected with multipoint injection. The engine is lubricated with a special synthetic oil having a low viscosity as the oil temperature can be up to 135° C.
The engine is mated to the six-speed manual gearbox and the car has standard permanent Quattro all-wheel drive. The car can accelerate to 100 km/h in 4.9 seconds with a limited top speed of 250 km/h. Also, the brakes are derived from Cosworth instead of Porsche as in the RS2 was the case. The front brakes are fitted with 360 mm ventilated steel discs with double-suction engine calipers. The rear brakes are 312 mm steel discs with single-engine suction calipers. The Audi RS 4 was fitted with 18-inch 9-spoke wheels.There is a total of 6030 RS 4 models B5 produced, car cost €97,381.
Audi RS4 B7
The Audi RS 4 came in 2006 on the market based on the Audi A4 B7. There is no RS version built on the B6 platform because only one Audi RS model would have the same time in production. The Audi RS6 that time filled the gap between the RS models.
The first model of the Audi RS 4 B7 was the limousine that appeared in late 2005. It remained in production until the end of 2007 after replacing the sedan version of the A4 B7 was by the A4 B8. Avant appeared in 2006 and remains in production until early 2008 after which replaced the base model for the A4 B8. Last appeared in 2006; the Audi RS4 Cabriolet. This model also disappeared with the arrival of the Audi A5 Cabriolet from the price lists in 2009.
All models have the same engine is also used in the Audi R8. This is a direct-injection 4.2-liter (4,163cc) V8 FSI motor that delivers an output of 420 hp and a torque of 430 N.m. The maximum power is launched at 7,800 rpm and the engine is able to continue until 8250 rpm. The maximum torque is achieved at 5500 rpm, 90% of which is available between 2,250 and 7,600 rpm.
The maximum speed is 8250 RPM. the motor also has a specific power of 100 hp per liter without the use of a turbocharger. The 4.2 FSI engine in the Audi B7 (Audi RS4) was until 2015 the engine with the maximum piston speed: 25.5 meters per second, 0.3 meters per second faster than the Honda S2000. Currently, the Ford Mustang Shelby GT350 is the car with the highest piston speed, 25.6 meters per second.
Audi RS4 B8
The third generation RS 4 came in 2012 at the market. Audi RS 4 Avant was only as stock and shares its drivetrain with the first generation Audi RS5. This represents a 4.2-liter V8 FSI engine with 450 hp coupled to a 7-speed S Tronic automatic transmission. The presentation of this generation RS 4 took place at the Geneva Motor Show 2012.
Like the then deliverable Audi S4 and Audi RS5 was also the Audi RS 4 available with optional sports differential on the rear axle, which conditions the torque to be distributed between the wheels. The S Tronic includes launch control, with the ability to sprint from standstill is used as efficiently as possible to generate maximum acceleration.
Audi RS4 Avant Quattro
The Audi RS4 Avant Quattro was launched at the Geneva Motor Show. It is based on the Audi A4 Avant. The Audi RS4 B8 MLB Volkswagen is using the platform, available with the drafting gearbox S-Tronic dual-clutch, which allows the car to 0-60 mph achieved in 4.7 seconds. Among the options available to the Audi RS4 (B8) ceramic brakes, and the car too heavy braking out without brake fade.