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BMW M5: The supercar heartbeat of the 1980s 5 Series

The first Bavarian super-sedan had the same 3.5-liter inline-six as the wedgy, aggressive BMW M1.
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Audi Studied the M5 and Built the New RS5 To Humble the Mercedes-AMG C63 S E Performance

The all-new Audi RS5, both in Avant and Sedan form, is powered by a 2.9-liter twin-turbocharged V6 engine working alongside a ...