Have a look at this thing. Can you believe it was built entirely by one man who is not Bruce Wayne? This is Bob Dullam’s replica of Batman’s Tumbler. It’s clearly the work of a mad genius. It looks awesome yes, but he didn’t skimp on the specs. It’s got the afterburner, the huge double-barrel wheels, and the body has all of the stealth angles.
As reference, he used only any and all images that would be available to you or me and the movies. And he did it in his garage. The neighbors must have thought he had gone a bit batty. And yes, he owns his own Bat suit as well.