![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjltaUv8Y_pofcgcEZRq21ya8s3Ya6t8MMUffDEYIkktQOmhP52GsvHJW4eYcINlkpkxfFWzWxha9lOgXLqjtiflAt3TYLo8vZTa9G9U4M62G60Asu1otPihlvLTA-48KGn1N6PAw/s400/1938_HispanoSuiza-DubonnetStreamliner02.jpg)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjX9K4wW5OhoVyUV4E1HJrCPdN2k102hbSDQ8-unGuukNk9-qi1qnPg8XsawB8uLQlzQqaruw4wude5e2vaeVFmLUEnfBNseEtLMnBTBy0AWIaJJIHIP43f8n-ezx0ikRPdDyELxQ/s400/hs.bmp)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjlKzr6QJcT4ew4dcdgFeIjYVhYRwM-xpcaOKfckq26jN-6bMPl8rUR1ve2oqn4mt1Ou7a89nmK0q1GaDvkUAskCgck9xhpgwHorGK-leKoT3w7lMo76xk27ELCB3QU26WJOaTtGQ/s400/1938_HispanoSuiza-DubonnetStreamliner%255BSaoutchik%255D-11.jpg)
Engine design was shared between the aircraft and cars... one crankshaft was carved from a 700 lb billet steel block. Consider that the types of engines in the 30's were huge displacement and fewer cylinders, like a 487 cu in straight 6 cyl... and that Hispano Suiza had aluminum cylinder block and overhead camshafts at a time when Rolls-Royce's venerable Silver Ghost was still using side valves, and an iron block cast in several pieces.
It was also ahead of Rolls-Royce in the braking department. While the Rolls had brakes on the rear wheels only, the Hispano had four-wheel brakes, servo assisted by a shaft driven off the rear of the transmission. Rolls-Royce later adopted this system under licence from Hispano and used it for many years.
http://www.thoroughbred-cars.com/cars/france/hispano%20suiza/Hispano%20Suiza%20H6C.htm
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