Absurd pipe dreaming. But Dubai-based Devel Sixteen has released a video of its quad turbo, 12.3-litre V16 (built by Steve Morris Engines) on a dyno producing 4515bhp and 3519lb ft of torque.

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Models such as the insane 5,000-hp Devel Sixteen, the Cadillac Sixteen, and Rolls-Royce 100EX Convertible never made it past the concept stage. The 8.3L V16 engine in the new Bugatti Tourbillon ...