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 ...

Originally unveiled at the 2013 Dubai Motor Show, the Devel Sixteen made waves with its audacious claims: a 12.3-liter quad-turbocharged V16 engine capable of producing an astonishing 5000 ...

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.