automaniac1
/ˌɔːtə(ʊ)ˈmeɪnɪak/Now rare
noun
A person who is self-involved or self-obsessed to the point of being mentally ill.
Origin
Mid 19th century. From auto- + -maniac, after automania.
automaniac2
/ˌɔːtəʊˈmeɪnɪak/noun
1A person who drives recklessly or at excessive speed; a dangerous driver.
2An enthusiast for motor vehicles and motoring.
Origin
Early 20th century; earliest use found in Horseless Age. From auto + -maniac.