New twin-turbo super-coupé serves up more punch than a BMW M4, as well as a whole host of other surprisesIf you attended the European*Cadillac ATS-V*press conference, you might have observed some trying to quell a wry smile when what were considered its rivals were revealed. There, alongside the new ATS-V, sat the*BMW M4*and*Lexus RC-F.Cynics, however, had their doubts dispelled as the conference ran on. In fact, as the development processes were explained, the upgrades detailed and the numbers presented, the ATS-V really began to appear a viable and seriously capable alternative to an*M4.It's virtually the same size, for starters. Similarly, motive power comes from six force-fed cylinders, albeit ones arranged in a ‘V’ instead of in a line. Power is sent to an electronically controlled limited-slip differential at the rear, although only via an eight-speed automatic gearbox. Alas, there's no manual option for European market models.The*Cadillac, however, packs more firepower. Its twin-turbo 3.6-litre V6 deals out 464bhp and 445lb ft, eclipsing the BMW's 425bhp and 406lb ft. Despite tipping the scales at 1768kg, some 81kg more than the equivalent M4, it's also claimed to be faster.*Manage what must be the world's best standing-start launch in perfect conditions and the ATS-V will reputedly sprint from 0-62mph in 3.9sec, beating the M4 to the punch by 0.2sec.

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