3 versus 4 is more a matter of taste, at this point. With the advances in engine mounts and balancer systems, the only thing that tells you the Picanto is a 3-pot is the fact that it gurgles more at low rpms. The Spark engine, on the other hand, sounds harsher and thrashier at high rpms.

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I'm wondering why Top Gear chose the Spark. I mean, I can list a few things it does better... the steering feels more natural (a plus for keen drivers) and the ride is a bit better, but by-and-large, the Kia feels like a more modern, more refined product. More space, better plastics, better design, better engine and transmission, better on-the-limit handling... MUCH better brakes. Except for the weird electric steering assist (annoying, but you get used to it), it's an exceptional car.