The Lamborghini 400 GT is a grand tourer car made by Lamborghini. It was built from 1966 to 1968. It was the successor to the 350 GT. In fact, it was based off the 350 GT, but had a larger V12 engine. There were two Lamborghinis known as the 400 GT: the standard 400 GT, and the one-off (one was built) 400 GT Monza.