Audi A4 DTM

Production period:	2004-2011
Class :	race car
racing series	DTM
Body versions :	Saloon
Engines:	Gasoline: 4.0 liters (about 340 kW)
Length:	4800 mm
Width:	1750 mm
Height:	1250 mm
Wheelbase :	2750 mm
Curb weight :	1050 kg

Audi A4 DTM is the name of prototype racing car of the German car manufacturer Audi , which was designed for exclusive use in the DTM .

History

 The A4 DTM was manufactured in six stages of development, bearing the internal production names R11 , R12 , R12 plus , R13 , R14 and R14 plus . The A4 DTM replaced the Abt-Audi TT-R , which was used between 2000 and 2003 in the series. From 2004 to 2011 , the A4 DTM competed against the DTM AMG Mercedes C-Class and in the first two years against the Opel Vectra GTS V8 .

After the Abt team had used a privately-developed Abt-Audi TT-R in the years 2000 to 2003 and won the title in the 2002 DTM season with Laurent Aïello , 2004 saw Audi return to the DTM as a factory team. The successful debut in the series ended with all titles (driver, team, manufacturer rating) of the championship. 

As with all racing cars of the DTM, the shape of the body of the A4 DTM is reminiscent of a production vehicle, here on the Audi A4 . Is the prototype constructed with a monocoque - chassis of carbon fiber reinforced plastic with integrated 70-liter fuel tank. Since the refueling at this time still in the race was compulsory, not as from 2012, a 120-liter tank was installed. The A4 DTM is powered by a 4-liter uncharged V8 engine with an air restrictor of around 340 kW (≈ 460 hp) and a maximum torque of more than 500  Nm. The power is delivered via a multi-plate clutch with three carbon fiber reinforced discs to the sequential six-speed sports transmission, which is combined with the adjustable disc locking differential on the rear axle in a housing. All wheels are individually hung on double wishbones , the internal spring-damper units are operated by push rods and rocker arms. The tires were supplied by the former DTM standard supplier Dunlop and had the dimensions front: 265/660-R18, rear: 280/660-R18.