High Quality Content by WIKIPEDIA articles! The Alvis Speed 25 was a British touring car made between 1936 or 1937 and 1940 by Alvis Ltd in Coventry. It replaced the Alvis Speed 20. The earlier car’s six-cylinder, four main bearing engine was replaced in the Speed 25 with a similarly designed larger six-cylinder in-line unit with seven main bearings for which an output of 110 PS at 3,800 rpm was claimed, along with a top speed of almost 160 km/h (100 mph).