I once made this for a "company" in Space Engineers, hasn't been used really.
(now that i'm seeing it, i could have made some minor improvements.)
Different manufacturers, different styles and colors ?
Terra cars makes me think of a heavy equipment manufacturer (like Caterpillar) that went "our stuff is strong too, why the hell not ?
" under a different name of course because it's illegal.
Not sure about the Vintek
pistons and "very-very-old-school-combustion-engine-logo". Though a stylized V with those elements could be very cool in my opinion, like a shiny V with cooling fins. Just my opinion though and yes, i'm picky.
logo with circuit boards elements could be nice !