This version of Octane, part of the first wave of 2008 Universe line, was one of the earlier toys to revisit G1 characters (what is now sometimes called "neo-G1"), shortly after the success of the "Classics" line of 2006. At the time, the goal wasn't simply to recreate the G1 alternate modes, but to "update" them with similar, but different alternate modes. Thus, Megatron became some kind of NERF weapon, and Onslaught traded in his former flatbed anti-aircraft truck mode for an armored vehicle. Octane's new truck mode is in keeping with such an update, having changed from an extended cab to a flat-nose. Don't look at the sides too closely, however, as it really looks quite unfinished. It works if you squint, basically.
Octane's aerial mode, once a jet plane, seems like something of a downgrade, now being a four-propeller cargo plane. For a lot of years, people have said that it should be scientifically impossible for a bumblebee to fly, yet it does so anyway. This is because the bumblebee's body is so large in proportion to its wings that it seems to defy the laws of aerodynamics (of course, bumblebees don't actually defy those laws, and science has long been able to explain this, despite that conventional wisdom). That's pretty much how I think of this toy's cargo plane mode, but despite the odd proportions, I'd say this is the toy's best mode.
Octane's robot mode is unmistakably an update of the original character, with undeniably better articulation than the original toy, but it must be admitted that it's nothing special. The melee weapon (necessary to complete the truck mode) is unwieldy, at best, and by this era, one could typically expect more fully-formed hands (you can't see them in this image, but they're basically just round stubs with weapon holes). Still, one appreciates the attempt, and getting a triple-changer to look good in all modes has always been a difficult prospect.