Compare the McLaren Speedtail 4.0 V8 Turbo Hybrid - [2018] vs McLaren 620R 4.0 V8 Turbo - [2019]. 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 McLaren Speedtail 4.0 V8 Turbo Hybrid or the McLaren 620R 4.0 V8 Turbo. We'll leave it up to you to decide which is your favourite.