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10th
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Twin-Turbo N54 versus Single-Turbo N55
A few years ago, we were among the first to get a brand-new BMW 335i on the dynamometer. We don't often dyno cars, but we couldn't resist. Before the first 335i was delivered to a paying customer, the rumor mills were bubbling about the 335i's twin-turbo straight-six being underrated.
Photo Gallery: BMW 335i and 335is - Dyno Test - Automobile Magazine