Compare the Dodge Viper ACR 8.4 V10 Extreme Aero - [2017] vs Porsche 911 GT3 Touring PDK 992 - [2021]. Find out which car is the fastest, most powerful, lightest or has the biggest engine in our top trumps style comparison page. Find out which car has the highest top speed or is the fastest accelerating, is it the Dodge Viper ACR 8.4 V10 Extreme Aero or the Porsche 911 GT3 Touring PDK 992. We'll leave it up to you to decide which is your favourite.