Ferruccio Lamborghini adopted the charging bull as his emblem with the introduction of his first production car, the V-12 350GT, which debuted at the 1964 Geneva Motor Show. This was a bold challenge for Ferrari, but it was the arrival of the Muira in 1965 which saw Lamborghini, the self-made tractor tycoon, really set the pace with the introduction of the 'supercar' class, redefining the shape and transverse engine specification which a supercar had to have. Continuing this theme, the Lamborghini Urraco is the only V8-engined Lamborghini, all other models being in V12 form, and was in production from 1972 until 1976 in 2,463cc form, during which time the next Lamborghini sensation, the Countach introduced, in 1974.