Pictures of the Lamborghini 400 GT. The Lamborghini 400 GT was a two-door coupe produced for two years from 1966 to 1968. Just 247 were ever made. There were two versions, the first known just as the 400GT or 400 GT interim, which was basically a modified 350GT with a bigger engine — a 3929cc V12 producing 320bhp. The second version was known as the 400 GT 2+2. It had a different shaped roof and other minor changes. It could seat four people rather than two. There was also a special version of the Lamborghini 400 GT made called the 400 GT Monza.