Lighter, More Powerful New SL
The new Mercedes-Benz SL arrives next spring with all-aluminum construction, weighing at least 250 pounds less than its predecessor. Plus, its 4.7-liter direct-injection twin-turbo V8 makes 429 horsepower to the old car’s 382. Torque? The current SL 550’s normally aspirated 5.5-liter is good for “only” 391 lb-ft while the new car churns up 516 lb-ft.
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