I thought I'd explain a little more on how his engine works (but I still don't know how he did it!)

His engine begins with a bunch of strips like this

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Ok, so starting with the first strip (the bottom one, it is given a slice of road, then the next one up is given a slice of road, but it is scaled down, and so on, so it gives the illusion of perspective. A great example of this is Mario Kart of course, but another great is Top Gear 1/2/3000 for the SNES, I suggest you check those out if you want to see what I mean (it has hills and stuff). You could indeed make a mario cart engine out of this, but I'd like to see what it would look like if you made the bands 1 px each, the quality must look amazing then, but at the loss of a high fps.