The 3.8 litre twin turbo V8 engine ( the same one that 's used in the McLaren P1 ) is immense .
The 3.8 litre twin turbo V8 engine ( the same one that 's used in the McLaren P1 ) took us by surprise .
The 3.8 litre twin turbo V8 engine ( the same one that 's used in the McLaren P1 ) is immense and took us by surprise .