Dunno what this is, it looks like concept art for upcoming Cybertron-toys.

Look like fan skecths to me...

it looks like fanart to me, we've seen Alternator-like designs from this artist before

I like them both.  The cement mixer is great, and the, what looks like Kup, is a great homage. 

 

Great piece of fan art. 

looks like far art as its not quite the same style as the other cybtron art work seeing as they have been water coloured while the real stuff was hand drawn then had digital colour and/or had marker pen for BG's

 

they are nifty ideas the blue guy looks like a young kup with a G1 prowl style transformation (bar the legs they look alot more like BT/alt mirage. The green guy reminds me of mixmaster in both his colour, arms, legs and altmode and i dont think hasbro would have 2 cement mixers in one line (tho odder things have happend)

Too good to be real. Those Homages are too good.

Definitally fan art. Heres the link to the actual Nissan Nails that that Kup is made from...

Nissan Nails

still really cool and good artwork  :thumb

Could care less for the cement truck, but that Kup-looking guy is great.

I gotta find a model of that truck.

those both look awesome, they seem a bit too final to be concept art though, if that makes any sense