The specially modified 1964 Morris Mini Cooper S broke the record for the 1000cc class at Bonneville Speed Week on the Bonneville Salt Flats in Utah, scoring an average 146.6mph (235.9kmh). (The Mini was given another burst down the track and clocked 156mph (251kmh) but needed to do it again to have that speed officially recorded, but it packed a sad and refused to start for the repeat attempt.)
Source: Mini Mania / YouTube