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The 2006 Audi A4 DTM
The A4 DTM – bearing the internal designation “R12” – presented by Audi last year was a completely new vehicle which – partially due to the model change in production – had little in common with the champion's car from the 2004 season. The 2006 Audi A4 DTM model, on the other hand, hardly seems to differ from its predecessor at first glance. That is why it was not given a new project number but designated “R12 plus” internally. The fact that, compared to last year, the A4 DTM has been subject to changes in merely a few details is a consequence of the regulations. To save unnecessary development costs, the technology – for the first time in the DTM's 22-year history – was almost completely frozen.
Technical data
Chassis Tubular space frame, integrated CFK safety cell for the driver, CFK crash elements front and rear
Engine Normally aspirated V8 engine, 90 degree cylinder angle, 4 valves per cylinder, to comply with rules 2 x 28.0 mm air restrictors
Engine management system Bosch MS 2.9
Lubrication system Dry sump
Cubic capacity 4000 cc
Power about 460 hp
Torque over 500 Nm
Drive Rear wheel drive
Clutch 3-discs CFK clutch
Gearbox Sequential 6-speed racing gearbox
Differential Multiple-disc limited-slip differential, adjustable
Drive shafts Constant velocity tripod plunge-joint driveshafts
Steering Rack-and-pinion power steering
Suspension Independent suspension at front and rear, doublewishbone suspension, pushrod system with damper/spring unit, adjustable gas-filled shock absorbers
Brakes Hydraulic dual-circuit brake system, light-alloy brake calipers, ventilated carbon fibre discs at front and rear, brake balance adjustable by driver
Wheels O.Z. forged aluminium rims, front: 10 x 18 inches, rear: 11 x 18 inches
Tyres Dunlop radial, front: 265/660-R18, rear: 280/660-R18
Length 4800 mm
Width 1850 mm
Height 1200 mm
Minimum weight 1070 kgs / 1060 kgs / 1020 kgs (A4 DTM 2006 / 2005 / 2004)
Fuel tank capacity 70 ltrs
Classe C 2006
Technical data
Chassis Tubular grid frame with steel roof and sides; other body parts such as doors, hood, fenders and rear cover made from GEK; integrated driver safety cell and defined front, rear and lateral crash structures
Length 4,870 mm
Width 1,845 mm
Height 1,255 mm
Wheelbase 2,795 mm
Fuel tank 65 litres
Weight 1,070 kg (including the driver)
Aerodynamics Aerodynamic modifications to front apron and side panels, flat underfloor, rear diffusor, standardised double-profile rear aerofoil
Displacement 4.0 litres
Cylinder head 4 valves per cylinder
Cylinder arrangement V8, 90 degrees
Output approx. 470 hp at 7,500/min
Intake air restrictors diameter of 2 x 28 mm
Transmission Carbon-fibre cardan shaft
Three-disc carbon-fibre clutch, mechanically operated via a foot-operated pedal
Standardised six-speed transmission with sequential gearshift, transaxle configuration with mechanical differential lock
Rear-wheel drive without acceleration skid control
Wheel suspension Double wishbones with spring/damper units on the front and rear axles, actuated via pushrods
Brakes Standardised carbon brake system without ABS
Steering Rack-and-pinion steering with power assistance
Wheels/tyres Aluminium wheels with a diameter of 18 inches and a width of 11 inches on the front / 1 2 inches on the rear axle; standardised tyres with a diameter of 660 mm on front and rear
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