So let's see how the two compare. Beginning with the BMW, it's powered by a 3-litre twin-turbo straight-six that can produce 510hp and 650Nm of torque. It drives all four wheels, weighs in at 1,865 kg, and the price begins with ₤ 85,000.
Then we have the Audi. It's packing a 2.9-litre twin-turbo V6 under the bonnet, which produces 450hp and 600Nm of torque. However while the BMW has the Audi licked for power and torque, the RS4 is lighter, weighing in at 1,745 kg. It's less expensive too – costing ₤ 70,000.
So what do you believe – easy win for the BMW or does Mat have something up his sleeve to offer the Audi the benefit? There's only one method to discover … LET'S RACE!