>>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 ...
>
>I don't see why you think its not a B52. Maybe the photoshopped it a bit to bring the fans forward.

There's another McLaren image taken from a slightly different angle. They might both be Photoshop jobs, but why bother if you can just use an actual aircraft of some kind?

Also a B-52H T33 engine dual pylon looks significantly different, and the nacelles as well (look at the joint between them). Images attached.

Walter: the B-52 TF33 engines have 28 visible blades in the turbines, the engines in the McLaren pics have 32 blades.