I don't know the technical limitations of the Vita, but I highly doubt that Asphalt Injection even comes close to pushing them. For the most part, it looks like last year's Asphalt 3D, only with a bit more visual polish. For example, the collisions don't look as terrible as they did on the 3DS. Drifting still looks (and feels) incredibly unnatural. Again, the upside is the brief Tron aesthetic that accompanies Adrenaline mode. To be fair, this is the stage in the Vita's lifecycle where a lack of visual performance is somewhat okay. This is a launch title, and it mainly operates under the assumption that things will get better as time goes by. Still, if you've been keeping up with coverage of the Vita, you know that it's capable of much, much more than this.
Asphalt Injection is a weak-sounding game, and that's primarily due to the fact that each car sounds pathetic. The "uhhhhhhhh" that emanates from just about every car sounds like the off-key humming of a poorly-educated tenor rather than the roaring of the mechanical beasts they apparently are. The co-driver voice is a bit annoying, and the soundtrack doesn't really assist in complementing the sense of speed that sometimes doesn't exist to begin with. To be fair, though, you don't really have to listen to any of it. However, it would have been nice to have something interesting in terms of sound.