The 2006 Audi RS 4 is an all-wheel drive sports car that appears in Forza Motorsport 2 and all subsequent main titles of the Forza series.
The second generation Audi RS 4, codenamed B7, replaces the B5 generation that was last produced in 2001. The B7 turned away from forced induction by switching to a high-revving naturally aspirated V8 engine. It also expanded the body style selection from previous models by offering saloon and convertible options.
The RS 4 was manufactured from 2006 to 2009 and the first model generation to be sold in North America. For the 2011 model year, Audi introduced the two-door Audi RS 5 Coupe to initially replace the RS 4 although a successor was released in 2012.
Aggressively flared fenders, extra air intakes, and of course a more powerful engine tune separate the Audi RS4 from the already high-performing S4 upon which it is based. Thanks to those upgrades, you’ve got a car that’s eager to eat up the miles and it’ll be happy to demonstrate its cornering prowess and substantial acceleration on any track you can throw at it.
Few cars have made as spectacular an introduction as the RS4 when it was revealed at a special ceremony in Audi’s hometown of Ingolstadt. A bright yellow RS4 appeared at the top of an icy ski ramp and charged down to the bottom, dramatically spinning in circles in front of spectators in the snow with the 4.2-liter V8 howling. Then, nonchalantly, the RS4 turned around and headed back up the steep, slippery incline without any trouble whatsoever. That’s the beauty of Audi’s quattro all-wheel drive, which provides stupendous grip (and in this application, a rear-wheel bias) to complement the powerful engine fitted into the relatively compact sedan. Aggressively flared fenders, extra air intakes, and of course a more powerful engine tune separate it from the already high-performing S4 upon which it is based. Of course, you don’t need to have a ski ramp with a crowd of screaming Audi fans egging you on to enjoy the RS4—it’ll be happy to demonstrate its cornering prowess and substantial acceleration on any track you can throw at it.
The RS 4 is a sports saloon with all-wheel drive that weighs 3638 lb (1650 kg) - 3685 lb (1671 kg) in Forza Motorsport 2 - which puts it in the same league as its market competitor, the 2008 BMW M3 Coupé, in such terms. However, due to being powered by a longitudinally mounted 4.2 litre V8 engine, it has 58% of its weight sitting on the front axle, which is a higher value than on its predecessor and makes it more prone to understeer than its competitors.
The 4.2 litre V8 engine features FSI direct injection, two double overhead camshafts with variable valve timing and operates with a compression ratio of 12.5:1 for increased efficiency. It produces 420 hp (426 PS; 313 kW) at 7800 rpm and 317 ft·lb (430 Nm) of torque at 5500 rpm. With a 0 to 60 mph time in 4.7 seconds and 0 to 100 mph in 11.2 seconds, the RS 4 has decent acceleration, although it is hardly quicker than its predecessor except for top speed which is 191 mph (301 km/h). Its all-wheel drive system is linked with a six-speed manual gearbox and equipped with a Torsen centre differential.
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