If you're not familiar with the SL550, then chances are you might be surprised if you happened to go head to head with one. Veiled as an unassuming luxury roadster featuring seat masagers and a wood trim steering wheel, this car hides a 4.6 liter twin turbo V8 under its elongated hood. In stock form this 2014 Diamond White SL put down a respectable 410whp and 462wtq on our dyno, which is capable of launching this car from 0-60 in just 4.5 seconds. Just because there isn't an AMG badge on the right side of the trunk, doesn't mean that this SL550 doesn't pack a mean punch.

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