![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjTTz1F-lUoc4rZ3-YJYagZjdtcWt8nBBsv4d5fkG72lsehtYFLJJA_l7R9uopaDpzIpWj7ROM8JlSKxCRSwWE_b1clGgqsSmCjs1RqWsGBv6M6xR6a8pqZCg73D2VTym4L7yNaCT3N4edM/s400/1938_HispanoSuiza-DubonnetStreamliner02.jpg)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhGNSddYkp_fv_d0NpJKXdCN8QGLXnYT1dYXKD-j2t0FA0qh_NPOW5wEfIbNOAs1tcoEZblTIxaaGXCckehgMtT0JEyAio5QP1xYsjuV4ccXHwRzowZpoGhMsKLEqPk_Qb5qz2VppaAD8wT/s400/hs.bmp)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgQrAIrPXCe0hZJO3f0uQZ-bMpQKwJg_4nM1cwyHSiyykgIFAjatVcGAU8ljngv6Lq0F5eMvM5wq4Kqs416-ZAaoyA2VxJIyDpA0RZnj_iIG295fQboqbmkdUXiY62eTzek3MRTlFe0res3/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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