>>>Promo pic for McLaren P1 (see attached)
>>>
>>>The aircraft in the background has at least 4 turbofan engines, in twin-pod configuration. That configuration is not commonly used. There are some examples such as B-36 and B-47 but those use twin turbojet, not turbofan, engines.
>>>
>>>I'm 99% sure it's not a B-52H, you can Google images for those engines, the inlet looks significantly different.
>>>
>>>It's defeated my Google-fu so far ...
>>
>>Actually, the B36 was piston driven.
>>http://freepages.family.rootsweb.ancestry.com/~pknox/b36/engine.html
>
>According to Wikipedia, it was a "hybrid" of sorts: http://en.wikipedia.org/wiki/Convair_B-36_Peacemaker#Addition_of_jet_propulsion

Thanks for the update.
I see that they added four jet engines.
The one I saw was just piston driven.