Here's What We Know About The All-New 4.0-Liter V8 In The McLaren 720SPatrick George2/15/17 9:12amFiled to: McLaren 720SMcLarenGeneva Motor Show1049EditPromoteShare to KinjaToggle Conversation toolsGo to permalinkOne of the interesting things about McLaren’s current lineup of street cars is that all of them use the same 3.8-liter twin-turbo V8 engine. It’s tweaked in various ways for the 650s, 675LT and even the P1, where it gets a hybrid system for crazy power. But for the McLaren 720S, McLaren’s packing an all-new V8 to go with it. Will it be fast? Yes. Answer’s yes.