The 2007 BMW 335i coupe's motivation comes from a hot (in more ways than one) new twin-turbo six that spools up an even 300 horsepower and pound-feet. Infiniti has retaliated by stroking its venerable 3.5-liter VQ V-6 to 3.7 liters to provide more power for the 2008 Infiniti G37 coupe.
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