In comparison, the top version of BMW uses the same size, the M340i Touring with 374 horses, 4.5 seconds in the sprint, while the top model of Mercedes, AMG C 63 S with 510 horses, uses 4.1 seconds. You can even hang on to hefty sports cars with the upgraded family car. An example is the new Porsche 911 Carrera S convertible which spends exactly the same amount of time on the sprint as the RS4-S.
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