World War One) were the 3 litre 1910 Vauxhall 20 hp (15 kW) and 27/80PS Austro-Daimler (designed by Ferdinand Porsche ). By the end of the 1920s, AC produced a 2 liter six, the 3.5 liter Nazzaro had a three-valve OHC (only until 1922), while French makers Amilcar , Bignan, Hispano-Suiza , and