We've got our hands on the all-new Audi RS6 Performance, and we're about to find out if it has what it needs to compete with Mat's new long-term test car, the Audi R8 Spyder!

So let's see how the two compare. Starting with the Audi RS6, it's powered by the same 4-litre twin-turbo V8 as the regular Audi RS6. However, power has been increased slightly over the regular car, and it now produces 630hp and 850Nm of torque. This power is delivered to all-four wheels via an 8-speed torque converter gearbox, and it weighs in at 2,090kg. If you're looking to pick up an all-new one, it'll set you back around £113,000.

Then we have the R8. It's equipped with a 5.2-litre naturally-aspirated V10 which can produce 620hp and 580Nm of torque. This power is delivered to all four wheels via a 7-speed dual-clutch automatic gearbox, and it weighs a fair bit less than the RS6, coming in at 1,695kg.

However, while it's a lot lighter than the RS6, it's also a lot more expensive, coming in at around £160,000!

So the RS6 is slightly more powerful, but surely a practical family estate can't beat a supercar... Right?! There's only one way to find out - LET'S RACE!