The 10 Most Unusual Engines of All Time Photos

2011 Bugatti Veyron 16.4 Super Sport quad-turbocharged 8.0-liter W-16 engine

2011 Bugatti Veyron 16.4 Super Sport quad-turbocharged 8.0-liter W-16 engine

2009 Bugatti Veyron 16.4 Grand Sport

2009 Bugatti Veyron 16.4 Grand Sport quad-turbocharged 8.0-liter W-16 engine

Bugatti Veyron 16.4 Super Sport 8.0-liter quad-turbocharged W-16 engine

Bugatti Veyron 16.4 Super Sport 8.0-liter quad-turbocharged W-16 engine

Bugatti Veyron 16.4 quad-turbocharged 8.0-liter W-16 engine

1913 Mercedes-Knight 16/45

Knight sleeve-valve engine

Quiet running and high engine speeds: Engines with sleeve valve control–the Knight principle–instead of valves. The photo shows the engine of the 16/45 hp Mercedes-Knight of 1911.

Innovative power plant: sleeve-valve engine of the 16/45 hp Mercedes-Knight (built from 1916 to 1923), based on the principle discovered by Charles J. Knight. The sleeve valve on the intake side is open.

Innovative power plant: sleeve-valve engine of the 16/45 hp Mercedes-Knight (built from 1916 to 1923), based on the principle discovered by Charles J. Knight. The sleeve valve on the intake side is open.

Smoothness and refinement: 16/40 hp Mercedes-Knight as phaeton, 1911, with a sleeve-valve engine based on Charles J. Knight's principle.

Smoothness and refinement owing to the sleeve-valve engine based on Charles J. Knight's principle: 1921 Mercedes-Knight.

1967 NSU Ro 80

1967–1972 Mazda Comso 110S

1967–1972 Mazda Comso 110S interior

1967–1972 Mazda Comso 110S