Greatest hits compilations are, by nature, backward looking. 

They are the already popular, beloved things brought together in one place. Nothing surprising.

There’s a horse running in the grille, the taillights have three segments each, and that roofline has been around for a while. 

The double-overhead-­cam, 32-valve Coyote 5.0-liter V-8 is 88 hp more robust than when the engine first howled for 2011, but it’s still a Coyote. 

And it’s still in the front and still drives only the rear wheels.

Both the Tremec six-speed manual and the optional 10-speed automatic transmissions are known quantities, and all the important dimensions and basic chassis designs from the S550 Mustang generation have been ported to this S650.