We know you've been waiting for this episode of our Top 5 Series. Watch the video to discover the fastest street-legal cars ever built by Porsche. Combined fuel consumption in accordance with EU 6: 911 Turbo S: 9,1 l/100 km; CO2 emissions: 212 g/km; 911 GT2 RS: 11,8 l/100 km; CO2 emissions: 269 g/km | Porsche

It's time for a supercar showdown! The Ferrari’s the most powerful car in this line-up, with a 3.9-litre twin-turbo V8 able to put down 720hp & 770Nm of torque! What's more, it's also the lightest competitor today, weighing in at just 1,385kg. As for the Lamborghini, it’s definitely going to be up for the challenge, given it’s packing a 5.2-litre V10! However, the power output is slightly less than the 488 Pista, at 640hp & 600Nm. And then we come to the Porsche 911 Turbo S. With a 3.8-litre fla