German Car Zone

Originally Posted by EnI

R8 GT trademark has just been registered by Audi AG.

R8 V10, perhaps? It makes sense.

Originally Posted by martinbo

^ I posted a comment some time back regarding the possibility and practicality of fitting the R8 with Audi's QTV rear differential technology. I'm too lazy to go and find it but it does cover the situation rather nicely.

In a nutshell - no, the Audi R8 ought not to be getting the QTV diff because, simply, it doesn't need it.

Originally Posted by Poverty

although auto motor and sport said it beat the GTR around the 'ring. Such a massive leap in laptime could be down to the use of the QTV. But then again the R8 always was a better handler than the GTR, it just lacked the grunt.

Originally Posted by martinbo

you must be referring to QTV or Quattro Torque Vectoring, which the R8 doesn't have. In fact its AWD system is quite and obviously different as a result of the mid-engined application. The R8 makes use of a viscous clutch centre differential that can apportion only up to 35% of the torque to the front axle but the current bias if I recall correctly is 10/90 in favour of the rear axle. It also has an electronic rear differential lock or limited slip differential to limit the amount of slip at a given wheel. The reason that an R8 earns such accolades in the handling department has much more to do with its mid-engined supercar layout and not the level of technology thrown at the AWD system.

This is not torque vectoring. Torque vectoring involves the method of directing more torque to a rear-wheel with the best grip in the onset of understeer so traditionally associated with AWD vehicles. This is done via a electro-mechanical clutch and gear pack located in the rear axle differential.

Torque Vectoring is a holistic application - not just focussed on the mechanicals at a given axle. It relies on steering angle sensors, yaw and grip level measurement to determine the dynamic attitude of a vehicle vs. the driver's intended direction. When it senses understeer through all of these systems, QTV then applies more torque to the desired rear wheel in order to turn the nose of the car into the corner.