650S MP number?

[mrloudly]

Does the 650S have a Mclaren "MP" number?

[vescaegg]

MP4 because it shares the same tub?

[Shmee]

Presumably on some internal system it still comes under the MP4 header, but in reality that's probably been fazed out.

Nowadays I assume it's all done by codename:

P11 (12C, 650S, 675LT)
P12 (P1)
P13 (Sports Series names TBC)

[mb1]

MP4 = McLaren Project 4

All McLarens, race and road cars, share the MP4 prefix since McLaren and Ron Dennis Project 4 race team merged a long time ago.