1980 Ferrari Pinin - 400i GT 2+2 based and flat-12 4.8-litre engined Pininfarina concept car saloon road test

Although this is not a 400 I make an exception for it as it's such a cool car:

https://drive-my.com/en/test-drive/item/2955-1980-ferrari-pinin-400i-gt-2-2-based-and-flat-12-4-8-litre-engined-pininfarina-concept-car-saloon-road-test.html